Can anyone identify this pusher biplane?
It looks like a Farman Aviation Works design but many builders copied the Farman designs. 

Most Farman aircraft had straight boxed struts but some had staggered wings and slanted struts:

Maurice Farman biplane

Source: http://flyingmachines.ru/Site2/Crafts/Craft28602.htm#tabs-1


Source:  ebay auction

Also similar to the MF.9


Source:http://flyingmachines.ru/Site2/Crafts/Craft28795.htm