OPEN IN NEW WINDOW LINK

Hello,
I would like to know how to set open in new window link when I’m using this code

[hb_image_box image=”http://test.unibind.es/wp-content/uploads/2014/03/UniFlexCover_1.jpg” title=”Uniflex Cover” subtitle=”Tapa blanda” link=”http://test.unibind.es/wp-content/uploads/2014/03/UniFlexCover-ES-LR.pdf”%5D

Kind regards and thank you for your great support!
Amparo