mangle issues

i need help with mikrotik please
am trying to configure a mikrotik board at my isp and am trying to be able to catch extensions(exe,zip,rar,doc) urls to save them to a cache server or route them to another dsl line

i have 2 dsl lines and i want to route them to line 2 or to cache server every url ending with these extensions but the problem is cloudflare, how can i make the mikrotik to read the url packets due to cloudflare so i can route them using mangle or any other option

thank you