[https://infosec.rm-it.de/2017/11/06/hitcon-2017-ctf-data-mining/](https://infosec.rm-it.de/2017/11/06/hitcon-2017-ctf-data-mining/)

Original writeup (https://infosec.rm-it.de/2017/11/06/hitcon-2017-ctf-data-mining/).