Chrome Version       : 54.0.2840.71 (Build officiel) m (32 bits) on Windows 10
URLs (if applicable) :
http://unesdoc.unesco.org/images/0023/002302/230282e.pdf
http://unesdoc.unesco.org/images/0021/002181/218189E.pdf#page=23

Other browsers tested:
     Safari: not tested
    Firefox: FAIL but fixed in last version of pdf.js, due in Fx 52
         IE: OK (using Adobe Reader, embedded in IE)

What steps will reproduce the problem?
(1) open the given URLs above

What is the expected result?
Some document codes (e.g. 37 C/5, 189 EX/Dec.15 in first example) are links to other documents (relative links to PDF, not HTTP)
They should be underlined, the cursor should switch to a hand over them and clicking should drive to the target document with or without a named destination

What happens instead?
The links are generally not processed
Worse, if the target of the link mentions a destination that exists in the source document, Chrome PDF viewer drives to this destination inside the source document, which is meaningless (see 2nd example, under "35 C/Resolution 36")