Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c0157724c32f846…

MALICIOUS

PDF

50.4 KB Created: 2020-07-31 20:10:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f396f88874afd139e7bf93f588e8015f SHA-1: 170539f6cd2698304bd50d3e6f9e8241169b99e4 SHA-256: 8c0157724c32f846c25076db47ffec031e4ee44d782bae60d75f2503790f5f79
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=winter+dreams+f.+scott+fitzgerald+pdf'. Additionally, another critical heuristic indicates a PDF link farm, with the first URL being 'https://cdn.shopify.com/s/files/1/0432/3144/5156/files/nesajabatopafivajig.pdf'. The ML classifier also strongly flagged this PDF as malicious. The document body contains obfuscated text and the malicious URL, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=winter+dreams+f.+scott+fitzgerald+pdf
    • http://files.iboyle.com/uploads/1/3/0/8/130814132/bogazili-woxerogivi-nelegujos-romenabu.pdf
    • http://files.dourobyboat.com/uploads/1/3/1/4/131407823/kuzif_gukokufazoxa.pdf
    • http://files.dustinnowlin.com/uploads/1/3/1/6/131637553/nozuj-zulitoropude-zodegatez-jizavilegomibef.pdf
    • http://files.hometownheritage.org/uploads/1/3/1/4/131453989/sutelakag-kuwekuparuwiti-kufunaxanejibut.pdf
    • https://cdn.shopify.com/s/files/1/0432/3144/5156/files/nesajabatopafivajig.pdf
    • https://cdn.shopify.com/s/files/1/0434/1563/4071/files/79432978842.pdf
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/dimupavonavibida.pdf
    • https://cdn.shopify.com/s/files/1/0427/9861/2636/files/merujowipopibipinoz.pdf
    • https://cdn.shopify.com/s/files/1/0429/8938/7939/files/gijogawifutoxid.pdf
    • https://cdn.shopify.com/s/files/1/0431/2065/6545/files/82081986592.pdf
    • https://cdn.shopify.com/s/files/1/0431/2009/9488/files/55421371291.pdf
    • https://cdn.shopify.com/s/files/1/0431/5516/1252/files/35924861040.pdf
    • https://cdn.shopify.com/s/files/1/0431/9579/3568/files/wesogojurako.pdf
    • https://cdn.shopify.com/s/files/1/0430/0845/8905/files/pevuxidogaxorolixeg.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060d4.bin
dc48dd5c57a2f5e36b266ba28f99d59a0b77c16339ace1441ec4497c1ae9a475		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60D4 5360 bytes
font_01_sfnt_off00007305.bin
4f8b23bb7b5eed164d4abcc48314d5ed7100d6cfe3f44ca3ea736480b6f2efb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7305 11636 bytes
font_02_sfnt_off000098f1.bin
de91570f50a7136400fd5d30b4225c4730c732b85b2cfea4c1cc5eeed8664338		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98F1 16284 bytes
font_03_sfnt_off0000ae37.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE37 4324 bytes

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