The other night when I was opening one of my zoho docs just to edit it in the cloud, something called "blank" began trying to download into my MacBook, which asked me if I wanted to continue the download. 

I had done nothing out of the ordinary. 

I though it was a mistake and tried other docs. The same thing happened several times.

Tonight I seem to be able to edit without this happening.

Have there been any recent viruses detected on zoho? Before I download any of my docs I want to know I'm safe.

Thank you