SSL Authentication with PEM files (cURL + PHP) - php

Question

I've already been able to do something similar on other websites, but now I'm having trouble authenticating using SSL certificate on a particular site. When I install the certificate in the browser, it works perfectly. But when I convert the .pfx file into .pem files and I try to use it with php + curl, it does not work.
My code is as follows:
<?php
$url = 'https://www2.agencianet.fazenda.df.gov.br/Inicio/Restrita/';
$pemfile = __DIR__ . '/pubKEY.pem';
$keyfile = __DIR__ . '/priKEY.pem';
$ch = curl_init($url);
$options = array(
CURLOPT_FRESH_CONNECT => true,
CURLOPT_HEADER => 1,
CURLOPT_RETURNTRANSFER =>true,
CURLOPT_FOLLOWLOCATION => 1,
CURLOPT_HTTPHEADER => array(
"Accept:text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8",
"Accept-Language:pt-BR,pt;q=0.8,en-US;q=0.6,en;q=0.4,de;q=0.2,es;q=0.2,gl;q=0.2,nl;q=0.2",
"Cache-Control:no-cache",
"Connection:keep-alive",
"Host:www2.agencianet.fazenda.df.gov.br",
"Pragma:no-cache",
"Referer:http://agnet.fazenda.df.gov.br/",
"Upgrade-Insecure-Requests:1",
"User-Agent:Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.99 Safari/537.36"
),
CURLOPT_SSL_VERIFYHOST => 0,
CURLOPT_SSL_VERIFYPEER => 0,
CURLOPT_SSLVERSION => 0,
CURLOPT_SSLCERT => $pemfile,
CURLOPT_SSLKEY => $keyfile,
CURLOPT_SSLCERTTYPE => 'PEM'
);
curl_setopt_array($ch, $options);
$data = curl_exec($ch);
print_r($data);
print_r(curl_error($ch));
curl_close($ch);
The pem files are these:
drive.google.com/drive/folders/0BxSFCb666mqCbUJIMlhIMjh0aGM?usp=sharing
Some images: