If the url is unknown to you then why not delete & forget about it? I've never ever clicked an unknown link - there's never anything worthwhile at the other end of such a deal
But if you have to then you can check a url quite safely without clicking on it:
Type it in here to see what this service finds:
http://scanurl.net/
And here:
https://www.whois.net/
And here:
https://sitecheck.sucuri.net//