=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 200 OK
Server: nginx
Date: Mon, 29 Jul 2019 00:37:50 GMT
Content-Type: application/pdf
Content-Length: 8280600
Last-Modified: Mon, 17 Oct 2016 16:44:29 GMT
Connection: close
ETag: &quot;5804ffed-7e5a18&quot;
X-Type: static/known
Cache-Control: public, max-age=2592000
Vary: Accept-Encoding
Access-Control-Allow-Origin: *
Accept-Ranges: bytes

Request headers
================
HEAD /wp-content/uploads/2014/03/Student_Government_Action_Kit.pdf HTTP/1.1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36
Host: studentgovresources.org
Accept: */*
Referer: https://ssdp.org
Connection: close


Link is valid.