There is a phishing scam that looks like a google docs invite. This email can be used to compromise your email, and download viruses. The following article explains the virus. I highly recommend you read it: https://www.google.com/amp/s/amp.businessinsider.com/google-doc-phishing-scam-malware-links-2017-5 EDIT: I know there are better explanations, but this is the first one I can find and trust.