Avast spamming url:mal notifications, boot HDD space being eaten up?

Suddenly started getting a lot of pop-ups from Avast today similar to the ones in the attached screenshots, and my boot HDD with Windows has had something take up a lot of space on it from out of nowhere. Relevant images and logs are attached.

More examples of alerts from Avast attached.

EDIT: I forgot to include the log from Malwarebytes, I tried to edit the post to include it but it wouldn’t accept it since it’s an xml file? I could try hosting it via google docs or something, just lemme know what I should do. Sorry, I messed up getting the log, the proper .txt version is now attached. Also, Avast popped up saying my virus definitions are out of date but doesn’t seem to be updating properly, I hope that’s not a side effect of the infection or something.

Bump?