DigiCert UltraDNS Sinkholed
VerdictMalicious
Severitymedium
WEBSITE ANALYSIS REPORT
http://short.do
public
Report summary
Submitted and final observations · captured HTTP activity
- Submitted URL
- http://short.do
- Submitted IP / ASN
104.21.63.48 AS13335 · Cloudflare, Inc.
- Final URL
- https://short.do/
- Final IP / ASN
- 104.21.63.48 AS13335 · CLOUDFLARENET
Final page
- Page title
- Free URL Shortener | short.do
- Final DOM MIME
- text/html; charset=utf-8
- Final DOM size
- 12.4 KB (12699 bytes)
Detections
Activity
- HTTP requests
- 33
- Observed hosts
- 4
- Script records
- 69
Estimated HTTP data
- Sent
- ~293.9 KB
- Received
- ~3.45 MB
Page capture
Final browser state
Detection signals
URLQuery findings, Threat Detection Systems, and IDS alerts
Threat Detection Systems
1Host infrastructure
Observed hosts are context, not independent maliciousness verdicts
| Host | Rank | Registered | First seen | Last seen | Sent | Received | IP | Fingerprints |
|---|---|---|---|---|---|---|---|---|
| short.do 16 alerts | N/A | 2025-01-23 | 2025-09-09 | 2026-07-31 | 18.3 KB | 987.5 KB | 104.21.63.48 | Cloudflare CDN Cloudflare is a web-infrastructure and website-security company, providing content-delivery-network services, DDoS mitigation, Internet security, and distributed domain-name-server services. HSTS Security HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS. |
| challenges.cloudflare.com | 11393 | 2009-02-17 | 2021-10-20 | 2026-10-18 | 13.9 KB | 2.42 MB | 104.18.94.41 | Cloudflare CDN Cloudflare is a web-infrastructure and website-security company, providing content-delivery-network services, DDoS mitigation, Internet security, and distributed domain-name-server services. |
| analytics.lc.cx | N/A | 2010-09-27 | 2022-09-05 | 2026-01-22 | 1.2 KB | 67.9 KB |  51.45.20.236 | HSTS Security HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS. Nginx:1.22.1 Web servers, Reverse proxies Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache. |
| brunhild.challenges.cloudflare.com | N/A | 2009-02-17 | 2026-06-24 | 2026-10-21 | 1.2 KB | 0 B | Not recorded |