Using my Iphone, I visited our website and when I click some of our Menu like Industry and Power instead of seeing the correct link I see Trk . tracksys55 . com then another websites which is somehow suspicious until it directed me to AppStore to download an app. What file should I check to verify or to remove this suspicious link. Thank you.

closed as off-topic by fuxia Nov 18 '16 at 12:41

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  • In short answer is yes. I am not sure how to get rid of it or what file it would be since all websites are set up differently. But to take further precautions I would change all passwords. This means your WordPress login, ftp login and if your hosting provider utilizes some sort of easy access dashboard ... I would change that password too. – Nicole Jul 6 '15 at 12:54
  • @Nicole: changing passwords is not a complete solution. – markratledge Jul 6 '15 at 13:30
  • @markratledge I know its not a complete solution but it is a start. – Nicole Jul 6 '15 at 13:32

Is there a malicious code inside my wordpress site?

Probably.

Carefully follow FAQ - My Site Was Hacked - WordPress Codex.

Then take a look at the recommended security measures in Hardening WordPress - WordPress Codex and Brute Force Attacks - WordPress Codex

Change all passwords. Scan your own PC. Tell your web host you got hacked; and consider changing to a more secure host: Recommended WordPress Web Hosting - WordPress Codex

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