We need A security Audit For Our Website for Malicious Software

Hello,

Recently we are facing the following issues in our website:


Our Google Adwords ads were disapproved because of malicious software ( unsafe domain URLs present on our website according to Google )

What we have tried so far
1) We have searched for the given links throughout our database but didn't found any
2) We are using Cloudflare as a web firewall agent and for security purposes.
3) We have also check for those links on webmaster and other tools like (sucuri, Qutter, Google transparency test).
4) We have also checked for inbound links but did not found the links provided by Google in that list.

There is one thing that happened to our website in the past, was that we have used the third-party free plugin from wordpress.org, because of which our website was hacked several times, we have already removed that plugin and any files related to it from our database.