This is what I gathered from the article, that it is looking for evidence of malware injecting itself between your browser and the DNS lookup, or poorly configu

This is what I gathered from the article, that it is looking for evidence of malware injecting itself between your browser and the DNS lookup, or poorly configured DNS servers doing similar. On a similar thread, Googlebot will often request a page that it can safely assume will 404, like example.com/noexist_d6956f303b25361a.html, just to make sure that non existant pages actually return a 404 instead of a 301 to a page with dynamically generated content based on the request name.