You probably aren’t looking for trouble, but there’s a good chance you’ll find it when you search the internet. An article in Information Week http://www.informationweek.com/news/security/vulnerabilities/showArticle.jhtml?articleID=218700239&cid=RSSfeed_IWK_All it was reported that the bad guys are trying to make sure their bad web pages come up when you search common terms on the internet. In this case the article is specific to Google, but your best bet is that this is being done for all major search engines.
The logic is quite simple. Businesses try to make it so that when you search for anything, their advertisement or web site will appear. The people behind the malicious software are in business.
Be careful when you click on the links to web sites that come up in searches. Often times you can make a pretty good guess as to whether or not the web site is relevant from the URL. It helps to understand URLs and learning a bit about them can make your browsing experience much safer.
Director of Technical Education
Author ESET Research, We Live Security