OK, I see where you found it and there is only ONE on entire internet. I even checked ebays completed listings and notta one! It was either a limited edition, or possibly a fake, or it COULD be dyed!
Sometimes gals will take a damaged white bag to a shoe maker or leather smith and have them dyed to bring them back to life again. That's the only thing I can think of. The photo you found is a year old.
Here is a link to where it is being sold but it is out of China and there isn't enough pics to tell if it's authentic or not. I will check out the site for you, but I wonder what shipping costs?? lol!
If you right click on the page you will see an option to translate to English.
http://celebrity-vipshop.com.ua/product/sumka-michael-kors-jet-set-scarf-tote-lilac/