Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e1ff679baa240a7…

MALICIOUS

PDF

57.4 KB Created: 2020-08-13 12:55:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1baee8bff4ffbbc0f505d386cbfddd4f SHA-1: ca875b097fba431b985ddd1fb98693bd2ec4f38e SHA-256: 2e1ff679baa240a7a4a65ffc9d7efb58ff8fb98cb4bd974126caee908217c98f
154 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 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL. The ML classifier also flagged this PDF with high confidence. The primary attack vector appears to be social engineering via a link that promises educational content but leads to malicious infrastructure.

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.cc/wb?keyword=unit%20states%20of%20matter%20gases%20worksheet%202
    • http://files.theglassstationstudio.com/uploads/1/3/0/9/130969809/kekigi-xekosid-tifirinenotipo-wodojog.pdf
    • http://files.dwp.co.il/uploads/1/3/2/6/132681452/1380040.pdf
    • http://lotatu.jdandj.com/uploads/1/3/0/8/130814328/dodasodetufabiv.pdf
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/75307748825.pdf
    • https://cdn.shopify.com/s/files/1/0431/9831/6705/files/harvard_business_review_case_studies.pdf
    • https://cdn.shopify.com/s/files/1/0437/9911/7986/files/xezijokovu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8800/2710/files/fofeledemi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3848/1311/files/49570246950.pdf
    • https://cdn.shopify.com/s/files/1/0434/2376/0536/files/pimoxogetiru.pdf
    • https://cdn.shopify.com/s/files/1/0437/2758/5445/files/verb_and_noun_examples.pdf
    • https://cdn.shopify.com/s/files/1/0429/7395/4204/files/rigidas.pdf
    • https://cdn.shopify.com/s/files/1/0440/8298/7158/files/1977_dodge_motorhome_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/1404/5341/files/99602345903.pdf
    • https://cdn.shopify.com/s/files/1/0434/6223/0181/files/anglo_saxon_literature_summary.pdf
    • https://cdn.shopify.com/s/files/1/0433/6576/1176/files/62384961852.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/
    • https://cdn.shopify.com/s/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008dc9.bin
578cd668592f7db89d1eea5de175959999dc68e7e26864f3fa514372ec55024b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC9 5216 bytes
font_01_sfnt_off00009f69.bin
f2566d151a2d89858a67031a599a564112ff3994980f10bed583565cd1578a70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F69 13280 bytes
font_02_sfnt_off0000c9d6.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D6 4324 bytes

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