I noticed that was happening too, so sketchy.
PDFs cannot be used as images without some type of embedding tool. The standard for web images are .png or .jpg; however, you could try .svg if you need them to be vector and scalable.
Here is information for creating a sub-domain on HostGator: http://support.hostgator.com/articles/cpanel/please-read-before-creating-a-subdomain; however, this may be different if you have a DV and are using Plesk instead of cPanel.
I would go that route inside of creating a folder and cname entry yourself — that’s essentially what cPanel will do, in addition to providing a GUI and settings for your subdomain. Once the sub-domain is setup, see the WordPress codex article about moving a WordPress site: http://codex.wordpress.org/Moving_WordPress
Try clickbricks.club/wp-login.php, but your installation definitely looks broken.
I would reinstall.
