I am using chrome 41 on Windows 7 (classic theme).
In chrome i have this url http://www.faszinationtür.de/images/PDFs/prospekt49.pdf open and copied it to the clipboard the result is the following http://www.xn--faszinationtr-7ob.de/images/PDFs/prospekt49.pdf
// why does this
http://www.faszinationtür.de/images/PDFs/prospekt49.pdf
// is copied / pasted as this
http://www.xn--faszinationtr-7ob.de/images/PDFs/prospekt49.pdf
Is this some strange URL-Rewriting according to a standard, or some javascript magic to rewrite the URL in the address bar or is my computer hacked?
Update to add details to the given answer
From RFC3492
Punycode is a simple and efficient transfer encoding syntax designed
for use with Internationalized Domain Names in Applications (IDNA).
It uniquely and reversibly transforms a Unicode string into an ASCII
string. ASCII characters in the Unicode string are represented
literally, and non-ASCII characters are represented by ASCII
characters that are allowed in host name labels (letters, digits, and
hyphens). This document defines a general algorithm called
Bootstring that allows a string of basic code points to uniquely
represent any string of code points drawn from a larger set.
Punycode is an instance of Bootstring that uses particular parameter
values specified by this document, appropriate for IDNA.