Suspicious URL [?sa=X&ved=] requests

Hi there,

I am keep getting these weird URL requests. They look like this:

www.website.com/this-article/<strong>?sa=X&ved=0CCoQ9QEwCmoVChMIn-Lyvs70xgIVk5iICh3JeQj</strong>

They all start with this string ?sa=X&ved= followed by random numbers and letters. They are usually added after posts.

Errors: These links are not generating any 404, 403 or any other errors, they fill the link request.
Site Scanned: There are no viruses or any changed files in the site directory.
WordPress Used: v4.2.3

Our website is already hardened with all WordPress security recommendations. However I feel it is a good idea to share this with other users and see if anyone has an idea about these links. Are they suspicious or should they just be ignored.

Thanks