Solve problems with rediect

There is contextual advertising, it goes to the site, from which immediately goes redirect to another site.
Utm tags, yclid, are disabled in advertising. Also, there are no specialists on the site-laying. a sripta that would put some of its get-parameters, labels. Just worth the usual 301-redirect in .htaccess
However, the metric on the site on which the redirect takes place, still sees that these are transitions from advertising marked "Yandex.Direct - not defined." Also, Google Analytics sees that these are transitions from advertising.
And the task is: to make a site-laying such a redirect, that cut off all the information that the transition was originally from advertising (reference, tags, etc.), and that in Analytics on the final site the transition was identified as just a transition from another site.
The problem needs to be solved urgently, the price can redlag