Hostgator web server corrupts png, jpg, gif, doc, docx, odt, pdf file types when uploaded; it doesn't corrupt bmp, svg and rtf file types though

I have got a website which is hosted by Hostgator. The problem is that when I try to upload new png, jpg, gif, doc, docx, pdf or odt documents/images, the server automatically corrupts them. This means that these file types aren't displayed/downloaded on the website at all.

When I upload new bmp, svg and rtf images/documents, the server doesn't automatically corrupt them and these file types are displayed/downloaded on the website perfectly fine.

All images/documents, including png,jpg, gif, doc, docx, odt etc, display/download perfectly if they are already on the server. This problem is just for new uploads. Also if you overwrite an image/document with a new upload, it automatically corrupts it.

I have rang Hostgator who can't help me because it's outside their scope.

Just one last thing, I will provide a link with a broken image: http://ift.tt/1IIbgck

I am Baffled; if anyone has any suggestions, it would be much appreciated.

Thank You