Recently I got a LinkedIn message from a business acquaintance that I had not had been in contact with for awhile. The message was innocuous enough what got my attention was a file link to a file sharing software site. Since I was not expecting the file nor was it a person I share files with, my alarm bells went off. I responded to the message that they should call or e-mail me as I did not open links unless I knew what it was about.
Later that day we talked via phone and yup their LinkedIn Account had been hacked. They had received a similar message and unfortunately clicked the link. The link downloaded Malware to their machine and then compromised their LinkedIn profile, then sending Malware laden messages to all of their contacts.
Now they were in the process of dealing with having to re-gaining access to their account. Their suggestion was to enable the duel verification feature of your LinkedIn profile. So when you log in it requires a response from your phone or authenticator app. Great advice. See the sample screen shot on how to do it below it is easy.
Go to your profile (Click on your Picture top of page on right) Then look at the drop down for Account then just below that is Settings & Privacy. Then go to Login and Security scroll down the the section with Two-Step verification and turn it on, easy.
Hope this helps. On the off chance you have concerns about Cyber Security for you Salesforce instance it might be worth a short conversation.