This is a sophisticated phishing effort by scammers to spoof legitimate websites (like Grammarly and Slack) and pay search engines for advertising. In return, the spoofed websites are pushed to the top of web search results for certain keywords. Some downloads are promoted by search results on websites like Google, Microsoft, and Yahoo.  Once a person clicks on the link in the ad, they might download malware, ransomware, or become a victim of some other scheme.

Be very careful about clicking on sponsored search results, which are usually clearly marked as an “Ad” next to the webpage title. Try to make sure any link you click on from a sponsored search result is a legitimate website. This can be difficult because cybercriminals try to spoof URLs very carefully. To be safe, you can always scroll down to relevant, unsponsored search results that link to web addresses you know are legitimate. 

Taking time to vet a link is worth it. This additional awareness won’t really slow you down, and it could save you countless hours spent recovering your computer from a virus.  As with all online activity, think before you click!