The URL http://%5C%5CPiper%5Cstaff%5CSchool%20Admin%5CStaff%5CHead%20of%20Piping%20Studies%5CJob%20description%20for%20Head%20of%20Piping.pdf contains characters that are not valid in the location they are found.
The reason for their presence may be a mistyped URL, but the URL may also be an attempt to trick you into visiting a web site which you might mistake for a site you trust.