Malicious PDF — malware analysis report

Static analysis result for SHA-256 092e3441fe007b71…

MALICIOUS

PDF

49.6 KB Created: 2020-08-30 18:33:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05fd01a0f52bbaed41c19d94ff0ba158 SHA-1: 7d011d73cca3080baa184daef3d90d2ccb4a955d SHA-256: 092e3441fe007b713ffa854430708296bb53af133a0f2b9e5e473c5543aa1048
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=munsell+color+chart+pdf', suggesting a lure to a malicious site disguised as a color chart. The presence of numerous benign Shopify links is likely part of an SEO spam campaign to mask the malicious redirector.

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.com/wix?keyword=munsell+color+chart+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/7573/1616/files/30683831716.pdf
    • https://cdn.shopify.com/s/files/1/0451/3175/9769/files/70977221314.pdf
    • https://cdn.shopify.com/s/files/1/0440/4350/1733/files/69546040658.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ebc71c692c94662b5a5c53dd72a94dc.pdf
    • https://static.usrfiles.com/ugd/b8c837_b012b1bd8bbb4e509d7b0874d4704213.pdf
    • https://static.usrfiles.com/ugd/6f53d7_544095b22aa24e88b763e01137a262e3.pdf
    • https://static.usrfiles.com/ugd/b8c837_96bb1220464242ba9e414e2cc5540424.pdf
    • https://static.usrfiles.com/ugd/48f461_3a5bad8ba358466fb9903f459ca75992.pdf
    • https://static.usrfiles.com/ugd/8acad3_48459c44e8e94a9c9da51016db420c3f.pdf
    • https://static.usrfiles.com/ugd/b8c837_594e62a26def4f958d9c5a3b23c604a4.pdf
    • https://static.usrfiles.com/ugd/02beb7_caa6ae168d34416cbf963dd6db49a91e.pdf
    • https://static.usrfiles.com/ugd/66c878_1fe341c8caaa40e29dc968cdd4ea3e5c.pdf
    • https://static.usrfiles.com/ugd/d5d855_b6abcdd570214d2c8991b4e17a03837e.pdf
    • https://static.usrfiles.com/ugd/d1d005_064d2a3580c04e0eb9cf15e86c8bf438.pdf
    • https://static.usrfiles.com/ugd/57c819_d68db166546a49328bc95483b6927d91.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074dc.bin
77337628a80fbb79c1e96ce3fae2630959e8eeefa15596146d12b31c364f3a3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74DC 5080 bytes
font_01_sfnt_off00008619.bin
52a7ec9f397149fccd408490e15d5e5e1739e6cf7163f3e529ab2cafe4b998bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8619 11472 bytes
font_02_sfnt_off0000ab17.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB17 4324 bytes

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