If you've come across a link to 174607.apps.zdusercontent.com and wondered whether it's safe to click, here's the short answer: there's no sign of danger. This is a subdomain of zdusercontent.com, a domain owned and operated by Zendesk, the widely used customer support platform. Zendesk uses such subdomains to host files attached to support tickets, so it's essentially a delivery channel for attachments rather than a standalone website.
When we ran our checks, the URL returned a 422 error ("Invalid URI"), which means the specific file or resource is no longer available — but not that the link was malicious. The connection was encrypted, protected by HTTPS, and served through Cloudflare, a reputable CDN. No blacklists flagged it, and Google's Safe Browsing service gave it a clean bill of health.
Because this isn't a commercial site, you won't find privacy policies, contact information, or an about page. That's entirely normal for a technical endpoint like this. The important thing is that the underlying infrastructure is well-maintained and associated with a trusted company.
If you see this URL in an email or on a website, it was probably a legitimate attachment link that has since expired or been removed. There's no reason to treat it as a scam. Just don't expect the link to work — and if you need the file, ask the sender to re-upload it.