No, in a browser search.
Years aO when I had windows as main os, clicking links in searches was real iffy, as it would redirect to some sitE and sometimes auto download. I purchased rollback rx as a result as I could rollback to a time before the download happened and be safe. Then they fixed it, and it happened far less
This is the firs time anything like his has happend in Linux though.
Your description sounds like it is OS-agnostic. It happened through a search and a browser.
However, I am kinda surprised that Linux would allow an automatic download, as Openurmind has already pointed out.
Might want to check your browser settings for downloading files.