Bitrix redirect to porn ads. How to cure?

Question

CMS

Help people.
Corporate website on Bitrix.
When you go to the corporate site through the search bar "Company name", using Google or yahoo, you are redirected to advertising hnya. If you use our search engines, then everything is fine.
Login to the site through the address drain is normal.
There was a bunch of crap in the site directory.
Deleted, not a fig does not help.
I do not really understand why there is no redirect through yandex or using the address bar?

Answer 1

If there are no backups - hire a bitrks programmer to remove someone else's code - and more importantly, to cover the backdoor with which malware was slipped into your system