Mixdrop download site is putting several fake and virus riddle sites for the first 1-4 times you click on the download button before you can download from them.
I also get them from PC Matic pro, SuperAntiSpyware and Malwarebytes.
Yup, Mixdrop is one of the shadier hosts used here. I've heard bad things about Anonfiles too. Anything that opens windows/tabs without permission should be avoided.