=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 200 OK
Date: Sat, 10 May 2025 02:27:31 GMT
Server: Apache
Last-Modified: Fri, 20 Nov 2020 02:54:56 GMT
ETag: &quot;8b0e74-5b480f82cd435&quot;
Accept-Ranges: bytes
Content-Length: 9113204
Connection: close
Content-Type: application/pdf

Request headers
================
HEAD /wp-content/pdfs/CoolRoofToolkit_Primer.pdf HTTP/1.1
Host: www.coolrooftoolkit.org
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.34 Safari/537.36
Accept: */*
Referer: https://greenmanual.rutgers.edu
Connection: close


Link is valid.