Daily 404 errors URL with "features_hash"

[pcha]

We have each day about 100 "Pages not found" error in the PS statistic module.

http://our-domain/shop/langue/categorieA/?features_hash=R9.V8.5.V3.R5.V16.V31.V35
http://our-domain/shop/langue/categorieA/?features_hash=R9.V8.5.V3.V31.V16.V35&sort_by=price&sort_order=desc
http://our-domain/shop/langue/categorieB/?features_hash=R9.V8.5.V3.V31.V16.R5.V35&items_per_page=8

We were not able to bloc these URL in the htaccess file.

 

Crawlprotect and Crawltrack are installed and working fine, but don't detect anything about these URL's.

 

Can somebody explain us what are these URL and how to block them ?

 

Thanks !