Recently, my website has been opening up ads when a link is accessed, and I fear it has been injected with some sort of malware. I do not know how to proceed in removing it.
I don't know if this is related to this problem, but when I click on a link, the following websites appear under "non-secure origins":
http://1.gravatar.com
http://www.randyburt.com
I also have the following error come up in one of the many scans I ran with free antivirus plugins:
Infected File:
/wp-includes/nav-menu.php
Malware type:
php.inject.fsock.19
Any help is much appreciated.