why my Adobe Acrobat Reader DC doesn't display hindi fonts ?

Iam using windows 10, i have a free Installed: Adobe Acrobat Reader DC (17.009.20044).

I have a pdf document & my Adobe Acrobat Reader DC doesn't display hindi fonts (whose screenshot is given below)

Now, i have searched many posts in this forums & have downloaded various recommendations [Adobe - Adobe Reader : For Windows ] but the problem is still there.

Also;

when i checked the document properties - fonts, i found that my pdf document uses -

ArialMT

Mangal

Mangal-Bold

MyriadPro-Regular

and when i checked My Computer >> C Drive >> Program Files >> Adobe >> Acrobat Reader DC >> Resource >> Font,

i found that ArialMT, Mangal, Mangal-Bold & MyriadPro-Regular fonts are not present in that folder.

(although my control-pannel's fonts section shows i have Arial & Kruti fonts but it doesn't says ArialMT as well as there is no sign of Mangal, Mangal-Bold & MyriadPro-Regular fonts)

Now,

i have assumed that the pdf is not displayed correctly is because of the absence of the above mentioned sets of fonts.

am i correct ??

if yes, then what's the remedy ? (is there a adobe-forum where i can download those above mentioned fonts free)

if no, then what's the cause of this problem ?