Getting an edit.php PNG Image when I try to view/edit posts??

Any help greatly appreciated!

I went to view and edit my posts as normal tonight, but when I click ‘Posts’, or ‘Edit’ in the Posts menu, I get a PNG image – a grey speech bubble.

The title in the browser tab is ‘edit.php (PNG Image, 12 x 12 pixels’. In the address bar, the address is as you would expect: sitename/wp-admin/edit.php

Does anyone have ANY idea why this has suddenly happened?

It may help if I mention that I recently had to remove a virus/iframe hack from my site – this involved removing the lines of malicious code, and deleting two infected files that appeared to have been created – they certainly don’t appear in the files of any of my other wp sites.

They were class-php.php and plugin-parse.php

Any help very much appreciated – this is a major time-sensitive problem for me!