If you visited in the past 24 hours, you may have seen a “Save As” popup rather than a website. I too found this concerning! Especially since I couldn’t get into WordPress to attempt any of the proposed fixes and had to venture into the shadowy labyrinth of my web host’s unintuitive interface.
Although you should definitely never download anything if you don’t know what’s going on and could be forgiven for never visiting that site again, in this particular case, it was a known WordPress glitch rather than digital terrorists. I uninstalled a plugin, regenerated a core file, and updated to the most recent version of PHP, some combination of which fixed the problem.
Sorry for any alarm that occurred as a result.