=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 200 OK
Date: Sun, 23 Sep 2018 15:50:50 GMT
Server: Apache
X-Frame-Options: SAMEORIGIN
Last-Modified: Mon, 18 Jan 2016 16:02:05 GMT
ETag: &quot;1a68f-5299ddfce5940&quot;
Accept-Ranges: bytes
Content-Length: 108175
Connection: close
Content-Type: application/pdf

Request headers
================
HEAD /wp-content/uploads/2016/01/gbook34-1.pdf HTTP/1.1
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)
Host: www.mahb.org
Accept: */*
Referer: http://sothisisfitness.com
Connection: close


Link is valid.