When i downloaded a viber file via url which was send by webhook - file downloading without format

Question

When i downloaded a viber file via url which was send by webhook - file downloading without format. Json example which i received from viber:

$VAR1 = {
          'message' => {
                         'media' => 'https://dl-media.viber.com/5/media/2/short/any/def/file/0x0/5a00/938127d8f690c8d79b8aea69304ceb44f16cb518b9715a00?Expires=1680167623&Signature=tfFc9MWIUdFEka8AIvIcpQkp9pah944mQpgMRi7OhxfDi8LRnQImDsCr4QVKkG1haHdlG0i7pgvz7uZJ7~yIvM73GXwOiiMmavs4M9rfwOHFlo1ozl0YeuXWO-6LNpQV0RdybUnS0VWhlSc19rFVjF323Ag7BECVREOv~RLOQJzQJ3igvApSWuJ79DSYH8cES9T5bzUpI5p7LSM1XK5y~t4xG5KkuPzPWPDdEmba-7HcPksEf9l0b9XUTZd7S-W4gE1w5stSNKH9rzsJf8yiGq7SgQ6GMu32Jqh4UHMhxxdqwqPtUzCFZCqXcyLLvl874Zrb7EacsPu5x2xGbuNV6VMbz-h8a~mnyaQ__&Key-Pair-Id=APKAJ62UNSBCMEIPV4HA',
                         'file_name' => 'test.pdf',
                         'size' => 1224099,
                         'type' => 'file'
                       },
          'silent' => bless( do{\(my $o = 0)}, 'JSON::PP::Boolean' ),
          'chat_hostname' => 'SN-CALLBACK-09_',
          'message_token' => '582213958535341418546011',
          'event' => 'message',
          'timestamp' => '1680164022405'
        };

P.S. links are rewrited :)

When i try to download file using link stored in media, the file downloaded without format. Any suggestions how to make file be downloaded in right format? PDF in current case.