SSTP establishment - 109.234.39.46

BEGIN OF HTTPS DATA:
2015-08-08 14:25:47
Source IP: 109.234.39.46
Country: RU RiskScore: 1 Malware: []
SSTP_DUPLEX_POST /sra_{BA195980-CD49-458b-9E23-C84EE0ADCD75}/ HTTP/1.1
Host: 109.234.106.8
SSTPCORRELATIONID: {5a433238-8781-11e3-b2e4-4e6d617021}
Content-Length: 18446744073709551615

This request reached the HTTPS part of my honeypot yesterday. I am posting this more out or curiostity as it is the first time I see this type of requests, A bit googling lead to
https://msdn.microsoft.com/en-us/library/cc247364.aspx and shows that this is part of an Microsoft Secure Socket Tunneling Protocol (SSTP) initialization.

Analysis Date	2 seconds ago
Blacklist Status	POSSIBLY SAFE 0/40
IP Address	109.234.39.46 ( Websites Lookup )
Reverse DNS	server6.com
ASN	AS35415
ASN Owner	WebaZilla B.V.
ISP	McHost.Ru
Continent	Europe
Country Code	(RU) Russian Federation
Latitude / Longitude	55.75 / 37.6166
City	Unknown
Region	Unknown