How can I investigate the maliciousness, if any?
It is not malicious, the tehguardian.com can be considered as a parody of the guardian.com.
They display the same content.
If you look very closely you will see the are not identical.
Some Background
The Guardian Newspaper is well known for containing for containing spelling mistakes and grammatical errors - it had the nickname The Grauniad as a result:
Deliberate misspelling of Guardian, coined by the UK satirical magazine Private Eye. Refers to the fact that in earlier years the Guardian newspaper was well-known for typographical errors.
Someone (stef) then thought it would be funny to produce a spoof website that was a copy of the The Guardian website but with deliberately inserted mistakes.
I’ve made a little hack called TehGuardian.com — it inserts random
grammar and punctuation mistakes into TheGuardian.com. Can you spot
the mistakes?
You may remember that in 2013 The Guardian rebranded online as The
Guardian. No, I thought it was a bit odd too. Something to do with
guardian.co.uk changing to theguardian.com
Now, if you saw that happening, what would your immediate reaction be?
Of course. Same here. I went to my usual domain registrar site, and
whacked in thegrauniad.com but obviously they’d thought of that.
So I typed in “tehguardian.com”, “teh” being the proper way to spell
“the” on the internet, and gosh. Would you look at that? Somehow
nobody had thought to buy it. And I use one of those one-click domain
registrars. And I was feeling mischevious. And…
...
TehGuardian.com
It’s the Guardian website as we know and love. But every single
article page has up to five grammatical errors introduced into it.
So if you make the mistake of typing in “teh” instead of “the” when
you try to reach the Guardian, you’ll also receive a slightly glitchy
version back.
It’s quite subtle. Probably my subtlest hack yet.
Every article that you read via tehguardian.com is exactly the same as
an article on theguardian.com except that I have introduced incorrect
Oxford commas, instances of “s’s” where it should be “s’”, swapped
“they’re” for “their” and a handful of other grammar-pedant-traps.
Source Teh Guardian FTW!!!1!