=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 200 OK
Server: nginx/1.16.0
Date: Mon, 29 Jul 2019 01:24:22 GMT
Content-Type: application/pdf
Content-Length: 4518940
Connection: close
Last-Modified: Fri, 10 Nov 2017 00:45:48 GMT
ETag: &quot;44f41c-55d963de66eb5&quot;
Accept-Ranges: bytes

Request headers
================
HEAD /wp-content/uploads/2010/11/Budget-for-Humanity.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: curbprisonspending.org
Accept: */*
Referer: https://ssdp.org
Connection: close


Link is valid.