chip.de is a rather trusted site of the popular German computer magazine "chip". It also offers downloads. I was surprised to see it blocked by Malwarebytes 3. I'm not affiliated with the magazine or site. This seems to be a false positive to me.
Tried to download Sandboxie 5.16 via chip.de:
hxxp://www.chip.de/downloads/c1_downloads_hs_getfile_v1_21760397.html?t=1485003661&v=3600&s=ed5edef8a892817880413a4f65e8c4a1
-Log Details-
Protection Event Date: 1/21/17
Protection Event Time: 2:01 PM
Logfile:
Administrator: Yes
-Software Information-
Version:
Components Version:
Update Package Version:
License: Premium
-System Information-
OS: Windows 10
CPU: x64
File System: NTFS
User: System
-Blocked Website Details-
Malicious Website: 1
, , Blocked, [-1], [-1],0.0.0
-Website Data-
Domain: dl.cdn.chip.de
IP Address: 88.217.189.139
Port: [59707]
Type: Outbound
File: C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
(end)