Unfortunately, there's been a repeated creation of a certain file page (FPS booster) that's the cause of this. It contains a link to download the disguised malware from an off-site source and people keep falling for it.
We remove the page and ban the uploader, but as with most annoyances they keep returning with new accounts (newly created, or using a stolen one) to repeat their attempts to spread this trash.
If people would be a bit more careful about what they download this wouldn't be as big an issue as it is, but not everyone's as cautious as they should be or know what signs to look for.