www.diigo.com redirects to random high risk sites; Trend Micro error sample below;

Also can't connect Diigolet plugin / can't authenticate.

Trend Micro InterScan for CSC SSM

Access to this URL is currently restricted due to a blocking rule.

URL: 57285.bestfastget.com/fly?q=San+Diego&enk=JqFmkUaxj5Em4ybjprlGwabjJpmmiSaJJplGgY+Jj6E=
Blocking rule: Block URLs of High Risk

The URL you are attempting to access has been blocked. Organization policy does not allow access to this activity.