Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ee0a6fccc5cd5f3…

MALICIOUS

PDF

43.3 KB Created: 2020-08-10 11:23:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19e953ad920f7653b54f01f066519826 SHA-1: 6608a77c50edb35fa2a9279cbc4800d9094f6ad5 SHA-256: 6ee0a6fccc5cd5f3e8df01ff460f4ccbe4909e6c7c101274311ad16f1875df11
154 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and heuristics indicating malicious redirector links and a link farm. The embedded links, such as https://ttraff.ru/pify?keyword=biophysics+syllabus+pdf, are designed to lead users to potentially harmful websites. The document body contains garbled text but also includes the same URLs, suggesting an attempt to disguise the malicious intent through SEO spam or phishing tactics.

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.ru/pify?keyword=biophysics+syllabus+pdf
    • http://files.saintmatthiasschool.org/uploads/1/3/1/3/131384374/5208378.pdf
    • http://files.philvantee.com/uploads/1/3/2/7/132712251/fukafefiwo.pdf
    • http://rapubukuv.multimediocrityshow.com/uploads/1/3/0/8/130813612/1ffa4b075e.pdf
    • http://files.sunshinerestaurant.ca/uploads/1/3/1/6/131606526/6104264.pdf
    • http://files.nanaspizzapr.com/uploads/1/3/1/3/131379246/lemavojojojiwe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/84368738446.pdf
    • https://cdn.shopify.com/s/files/1/0435/7583/6835/files/introduction_to_structural_dynamics_and_aeroelasticity_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/0134/7226/files/arbitral_award.pdf
    • https://cdn.shopify.com/s/files/1/0428/0814/8127/files/25453131045.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83142526711.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9423/files/body_language_tips_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9477/files/37773648469.pdf
    • https://cdn.shopify.com/s/files/1/0433/9993/8211/files/wusinuvagozoves.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/punitanajatedo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5282/5767/files/43881997074.pdf
    • https://cdn.shopify.com/s/files/1/0439/1570/6523/files/autumn_leaves_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0447/8458/2813/files/biodynamic_compost.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_off00006aa8.bin
c79d75b1bb2cd39d16acccb49caf059c087b10f05512e7183cae5becb50bd983		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA8 5440 bytes
font_01_sfnt_off00007d2d.bin
a3000958592950c26f4ea2f944ace872bfdde528adfd8f8e16f9f24f63f53b0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D2D 10312 bytes

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