From 2-spyware.com
Searcher4u.com is a potentially unwanted program[1] that modifies particular browser preferences (default search engine, new tab, homepage) in order to show search result pages from a search engine of its choice. By doing so, it can inject deceptive advertisements of affiliated portals into the results from Bing, Yahoo, and other legitimate sources.
By redirecting people through a fake search site, Searcher4u.com virus is capable of collecting various browsing-related information, such as the device and browser details, used apps, visited sites, search inquiries, geolocations, etc. This gathered intel is used to create ads specifically for you, making them irresistible.