Malicious PDF — malware analysis report

Static analysis result for SHA-256 7883c9d0730955ec…

MALICIOUS

PDF

41.8 KB Created: 2020-09-02 13:54:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f8ca1bb205a982d6a8c4be72aa8eacf SHA-1: 4641db3bf1032bfaafb52c736fec2c3e1a497e48 SHA-256: 7883c9d0730955ecbb176c4951b073408e4f7508f03bcec32cb7c99278311173
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=news+feed+design+template'. The document body also contains this URL, suggesting it's a lure to trick users into visiting a malicious site. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.
  • 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.com/wix?keyword=news+feed+design+template
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/fisom.pdf
    • https://cdn.shopify.com/s/files/1/0433/8994/3975/files/36450233911.pdf
    • https://cdn.shopify.com/s/files/1/0432/6221/4304/files/punotatajetep.pdf
    • https://static.usrfiles.com/ugd/0e9fc2_69ebc62429c647a8bac77c282b922681.pdf
    • https://static.usrfiles.com/ugd/405339_8b6214528ba5498698214734f0d4ce92.pdf
    • https://static.usrfiles.com/ugd/b8c837_aabc427c43f2495bb4eb577199b2d6a7.pdf
    • https://cdn.shopify.com/s/files/1/0440/2987/0245/files/gipazasomizobakotapasab.pdf
    • https://cdn.shopify.com/s/files/1/0462/1556/1370/files/supreme_commander_forged_alliance_controls.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057d3.bin
cdfbfe7fe8a1955a2c2984309fce85569dca4a3327a76db530cb252c49867e8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57D3 5324 bytes
font_01_sfnt_off000069ff.bin
3b4a0295739eb4affff45eb3b6bbf55c7c2aa3b708d93a4b1da162b03ecc228d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69FF 15940 bytes

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