Shared hosting and .rar and .zip files appearing in my website 404 error page list without a referring URL [migrated]

I've been seeing lots of entries in my 404 error page lists in my shared hosting account, which are attempts to hit sub URLs on my 'static' website, such as (usually with no referring URL):

/xefxbfxbdxefxbfxbdxefxbfxbdxefxbfxbd%20website.rar
/aspweb.rar
/520.rar
/install.tar.gz
/sql.bak
/a.rar
/web123.zip
/aspweb.zip
/wwwroot.tar

These are aside from the usual attempts on /wp-login.php, etc...

I'm wondering if anyone can explain the above, is it just hacking attempts, should I be worried or ignore them? The site is going through CloudFlare over HTTPS.