This subdomain belongs to Planday, a legitimate workforce management company, but the endpoint itself is broken. Instead of a working page, it returns a 400 error from Azure, meaning the URL is invalid or misconfigured. Most companies of Planday's size maintain stable infrastructure, so this looks like a forgotten or misdirected service link rather than a scam. There are no reviews for pdnewsfrontendprod.cdn.planday.cloud because there's no content to review. If you came across this URL somewhere, it's likely a dead end. You don't need to worry about security or fraud, but you also can't use it for anything. Treat it as a broken link and move on.