Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e3acee555566f21…

MALICIOUS

PDF

53.9 KB Created: 2020-08-19 17:03:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 060d11da73d25aefd1be9c1b97c8c3c4 SHA-1: 4b0b3eafbfeb87ca566a8ac456357b4b60d0c539 SHA-256: 9e3acee555566f21f00937ed69b7d3ab620f888e9ef17552af37e1f06832be21
90 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.com/pify?keyword=gcse+sequences+worksheet+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to a malicious site. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 2

  • 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.
  • 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.com/pify?keyword=gcse+sequences+worksheet+pdf
    • http://files.wheelhousetheater.org/uploads/1/3/1/3/131379946/nebikorebokapubepob.pdf
    • https://cdn.shopify.com/s/files/1/0431/1918/1978/files/ribefe.pdf
    • https://cdn.shopify.com/s/files/1/0437/6156/5850/files/26832422292.pdf
    • https://cdn.shopify.com/s/files/1/0432/6552/3862/files/pekitazakoxesufomitew.pdf
    • https://cdn.shopify.com/s/files/1/0428/7397/9043/files/83714567623.pdf
    • https://cdn.shopify.com/s/files/1/0432/8059/7152/files/zeduduvexegevafarawas.pdf
    • https://cdn.shopify.com/s/files/1/0434/6229/5714/files/ammocoete_larva.pdf
    • https://cdn.shopify.com/s/files/1/0432/2246/6727/files/4th_definition_of_myocardial_infarction.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000802c.bin
e206cc032525e5f63895578b81f678faaed11a8ac189e64e10abf154aead2caf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x802C 5148 bytes
font_01_sfnt_off000091b5.bin
fd41555e17672ca44fdc190cedce62a8bcb77960a87cc6891b1eba20f5f27b4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91B5 13668 bytes
font_02_sfnt_off0000bce3.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCE3 4324 bytes

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