I won't give an assessment on the location as there isnt enough detail for me to answer. However try this process and see where it leads you. Assess whether it is potentially hurting/helping/neutral take action if it is hurting. Some things to look for are: 1) Sudden drop in rankings that matches an increase or appearance of said traffic. 2) An increase in 404s 3) Scan site for possible hacks/malware 4) Look for odd pages for potential hacks (audit) 5) Insure you are using a security plugin which is correctly configured to deal with known spam blacklists 6) Check there are no tag, redirect image issues often created by plugins like yoast 7) Exclude your and owners IP from results 8) Backlink audit 9) Check everything is up to date: php, server software, CMS etc Counter measures can include: Setting up a WAF Blocking certain agents in robot or htaccess files Blocking IP or country IP ranges Limiting hotlinking