Malicious PDF — malware analysis report

Static analysis result for SHA-256 763d1247fc7678ff…

MALICIOUS

PDF

48.0 KB Created: 2020-08-09 10:20:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66149306fbddb9a9539788c98c46cf8b SHA-1: 8048fd67156ff6503e6dfb90bd40ff28b4cc2bc3 SHA-256: 763d1247fc7678ffe5816dc7ef17f9107e00894ef756441afe7077fc9a124606
154 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains numerous links, many pointing to a redirector service. The presence of a link farm suggests an attempt to distribute malicious content or phish users. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a malicious intent to redirect users to potentially harmful sites.

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/pify?keyword=analisis+pestel+definicion+pdf
    • http://files.davidmoerman.com/uploads/1/3/1/4/131437669/6ad27499.pdf
    • http://lubuli.aepministry.org/uploads/1/3/1/3/131383657/b38f8e02a.pdf
    • http://wuponuner.capturedbyelijah.com/uploads/1/3/2/8/132814930/87cc6bc7c8b.pdf
    • http://files.irishfestfunrun.com/uploads/1/3/0/8/130874633/kalukariguzap.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/2624/9885/files/akon_lonely_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0971/files/penaritusurujigoduri.pdf
    • https://cdn.shopify.com/s/files/1/0436/3016/6176/files/jupujewoseninavuvu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/historical_approach_to_research.pdf
    • https://cdn.shopify.com/s/files/1/0434/6924/2534/files/voxodunakulev.pdf
    • https://cdn.shopify.com/s/files/1/0433/6127/1959/files/11952542341.pdf
    • https://cdn.shopify.com/s/files/1/0435/2717/6344/files/bienestar_laboral_libros.pdf
    • https://cdn.shopify.com/s/files/1/0429/4675/6774/files/tutizo.pdf
    • https://cdn.shopify.com/s/files/1/0439/0119/0299/files/78882404347.pdf
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/39369776592.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7418/files/xodudotewiwipiwokuja.pdf
    • https://cdn.shopify.com/s/files/1/0433/9938/1157/files/91279285115.pdf
    • https://cdn.shopify.com/s/files/1/0432/0873/6927/files/99672833463.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_off00007eac.bin
abc272b3d457edf14c2181676c0f95c0505005ec1e958d6e0cca8d63e29ab26b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EAC 5040 bytes
font_01_sfnt_off00008fef.bin
4b1d7c66216a8d9130e6193f5ad99afaa73a75fe4fa2df70adc59b150b733d1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FEF 10104 bytes

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