Commons Space at the World Social Forum 2016 2016.wsf.federated.wiki jon.2016.wsf.federated.wiki
Thanks to Michel Bauwens tweeting about a medium article that used the image as a cover, which could in turn be uploaded to Google Image search for finding its sources, I have come into posession of the desired resources. Lovely quest!
The author of the poster is María Castelló Solbes .
Local copies of the files have been created and the links added to the Commons Space : Library - Materials Sharing