@jespah,
To Elisea:
If the ceiling has back mold, then I'd make a good guess that the moisture in wherever it was stored also created mold and embedded itself into the upholstery.
There is lots of missing info here such as the composition of the furniture upholstery. Attempting to clean mold off of cloth upholstery (even highly durable Herculon) material s going to change the color. Leather, - might be even harder to cause a good solution. Micro-fiber will not respond well to such cleaning attempts .
I can't tell you for certain a solution with any great expertise. I used to sell furniture...and many people used stain-preventers such a Scotchguard to attempt to prevent stains; however, once a stain like mold gets into material even professionals won't get good results.
I have heard that when it's on walls, people use dilute bleach that can help reduce or remove it from a wall. Ceiling mildew in a room or bathroom people often use sodium triphosphate.
Of course, whatever you use, you'd need a mask and have plenty of ventilation while you attempt this. Are you sure this is worth the trouble?
That's the extent of what I'm aware.