A web spam campaign that targets Koreans is creating problems for site administrators around the world. Hackers are compromising vulnerable Korean-language WordPress websites, but are also polluting search engine results for non-hacked sites globally. The campaign is looking to drive traffic to spammy websites with three main themes: Call girls for travelers, online gambling and off-white merchandise Each theme uses hundreds of specific keywords (in Korean) to attract visitors, such as motel travel massage or beautiful sister in business trip
Source: https://threatpost.com/wordpress-sites-call-girl-search-engine-pollution/145555/