Unwanted ads are one of the most common problems that site owners ask us to solve. Recently, we’ve noticed quite a few requests to remove intrusive “shorte st” ads that they never installed on their sites themselves. My colleague Denis Sinegubko of UnmaskParasites helped to investigate this case.
Shorte[.]st is a service that hijacks links, forcing visitors to view a page containing ads before they can visit the link they clicked on.
from Unwanted “Shorte St” Ads in Unpatched Newspaper Theme