Detected code used associated with a Russian backlink purchase service Sape. This service allows webmasters to sell placement of third-party links on their sites. This practice is considered a violation of Google's Webmaster Guidelines as explained here.
Example of activity that Google considers manipulation:
...Buying or selling links that pass PageRank. This includes exchanging money for links, or posts that contain links; exchanging goods or services for links; or sending someone a “free” product in exchange for them writing about it and including a link
Moreover, we often find that Sape code installed by hackers on compromised websites
Affecting: Any web site (no specific target).