Search sites have a mechanism called "listing ads" in which ads related to search terms are displayed in a prominent place. Some of these listing ads and those that appear at the top of search results are mixed in with sites that are intended to be fraudulent.
More and more people are directed to malicious sites. There were 2,881 cases of "fake sites" that imitate real companies and "raudulent sites" in Japan last year. A total of 1,940 cases compared to the previous year.