try

curl 'https://xintranet.ircad.fr/dl/upload_files.php?login=cchadda' -H 'Cookie: username="nlBNjJPt5WM_"; password="VyPE9URKHPcGIe8UFWJhFQrarJFyfJPE"; rememberme="true"; validation="e75b7d3e865fa7414d9804604893e11e"; __utma=117091934.1755676464.1395937253.1395937253.1396014761.2; __utmz=117091934.1395937253.1.1.utmcsr=google.fr|utmccn=(referral)|utmcmd=referral|utmcct=/imgres; PHPSESSID=4e4509771210d5827326d48d08cc8d88' -H 'Origin: https://xintranet.ircad.fr' -H 'Accept-Encoding: gzip,deflate,sdch' -H 'Accept-Language: fr-FR,fr;q=0.8,en-US;q=0.6,en;q=0.4' -H 'User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.149 Safari/537.36' -H 'Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryqVITN19BHt4Vvlvw' -H 'Accept: application/json, text/javascript, */*; q=0.01' -H 'Referer: https://xintranet.ircad.fr/dl/' -H 'X-Requested-With: XMLHttpRequest' -H 'Connection: keep-alive' --data-binary $'------WebKitFormBoundaryqVITN19BHt4Vvlvw\r\nContent-Disposition: form-data; name="file[]"; filename="ppd.tar.gz"\r\nContent-Type: application/x-gzip\r\n\r\n\r\n------WebKitFormBoundaryqVITN19BHt4Vvlvw--\r\n' --compressed