Black hat SEO

SEO (Search Engine Optimization) refers to methods used to improve a website’s position in search results returned by search engines in response to specific search terms. Today, search engines are a key resource when looking for information; the easier it is to find a website, the more demand there will be for services offered by the site.
There are numerous SEO methods – legitimate and prohibited by search engines.   These techniques are commonly used by cybercriminals to promote malicious resources.
Here is a general overview of how users come into contact with “optimized” resources, and how cybercriminals make their resources more visible.
By using keywords, which can be entered either manually or automatically (for example, using Google Trends), cybercriminals create websites containing relevant content. Usually, this is done automatically: bots create search engines queries and steal content (fragments of text, for example) from pages that come top of the search results.
In order to ensure that a new website falls among the top search results, first and foremost, the creators have to force web crawlers, or spiders, to index it. The simplest way to initiate the indexing process is manually, by using, for example, the pages on Add your URL to Google, where users can enter their website into the search engine’s index. In order to push the site up toward the top of the results more quickly, a link to the site may be posted on resources that are already known to search engines, such as forums, blogs, or social networks. The link to the target page on these websites will make it appear more prominent during the indexing process. Furthermore, a site can be “optimized” with the help of botnets: infected computers conduct a search using specific keywords, and then select the cybercriminal website from the results.
A script is then put on the newly-created web page that, with the help of HTTP header processing, can be used to identify visitors. If the visitor is a web crawler, it will be “shown” a page with content associated with the chosen keywords. As a result, the page will be pushed up the list of search results returned. If a user is led to the site from a search engine, then s/he will be redirected to a malicious site.

                                             Black hat SEO: creating and presenting data
Websites that are promoted using illegal or dubious methods are promptly removed by search engines from search results. This is why cybercriminals, as a rule, use automated processes to create and optimize such sites; this speeds up the process and multiplies the number of new malicious web resources.
Automatically created web pages can be placed anywhere: on cybercriminal resources, on legitimate resources that have been infected, or on free hosting services or blog platforms.