A common attack that is being seen on the web over the past 2 months is something called The “HoeflerText” font wasn’t found pop-up. This popup is part of an attack called EITest, which injects javascript into a hacked web site that you are visiting in order to display the popup. The attack works like this.
Article Link: https://www.bleepingcomputer.com/virus-removal/hoeflertext-font-wasnt-found-and-chrome-font-pack-guide