The fake Flash installer apparently tricks people into downloading what Symantec identifies as Adware.Eorezo, an adware that inundates Internet Explorer with advertisements. Unfortunately, we can't replicate the problem, but Abrams said he encountered the issue on three separate visits and captured one of them on video:

We reached out to Equifax to ask whether the company has already cleaned up the adware downloader. To be safe, though, don't click on any random Flash installer that pops up when you visit the agency's website in the near future.

Update: Equifax says its IT and security teams are looking into the issue, but while the investigation is in progress, the page has been taken offline. The company plans to share more information as it becomes available.

Update 2: An Equifax rep said the company's website was not compromised, and the errant Flash downloader came from one of its vendors' code.