=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 200 OK
Date: Mon, 16 Sep 2019 17:18:45 GMT
Content-Type: application/pdf
Connection: close
Set-Cookie: __cfduid=d13dd5ba9bbb3e285f49741164bec146a1568654325; expires=Tue, 15-Sep-20 17:18:45 GMT; path=/; domain=.shinsei.com.br; HttpOnly
Last-Modified: Fri, 07 Apr 2017 17:37:24 GMT
Cache-Control: public, max-age=2592000
Expires: Wed, 16 Oct 2019 17:18:45 GMT
Vary: Accept-Encoding
CF-Cache-Status: MISS
Server: cloudflare
CF-RAY: 5174805fae732028-DFW

Request headers
================
HEAD /wp-content/uploads/2016/12/livro-digital-calos-calosidades.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: centrotecnico.shinsei.com.br
Accept: */*
Referer: http://centrotecnico.shinsei.com.br
Connection: close


Link is valid.