Violating the European law by placing cookies without notification.
http://ec.europa.eu/ipg/basics/legal/cookies/index_en.htm

Browser difference :
https://www.websicherheit.at/website-malware-viren-scanner/?url=www.matoa-indonesia.com

Blacklisted :
http://www.urlvoid.com/scan/matoa-indonesia.com/
https://www.virustotal.com/en/url/b096d60cd8bd5d9369fc60c66704ccfe65764307305094c963c5e175996a90ff/analysis/1484901559/

Truly horrible IP history :
https://www.virustotal.com/en/ip-address/103.28.12.97/information/
http://urlquery.net/report.php?id=1484900797849