I reviewed this suggest edit by an anonymous user, it looks strange for me, is this normal ? for me it looks like hack, because I can not able to see the user who suggested that edit see the screenshot. Instead it simply shows anonymous user and also he introduce spam like URL.
Anonymous users are permitted to make suggested edits. Because we have good users standing at the gates preventing the bad edits getting through the spammers largely give up and we are not overwhelmed by these edit suggestions.
You correctly rejected this edit as
This edit introduces spam, defaces the post in some way, or is otherwise inappropriate.
because it does