Malicious PDF — malware analysis report

Static analysis result for SHA-256 109361555b02359e…

MALICIOUS

PDF

33.1 KB Created: 2020-08-25 14:11:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8b7be29071a5740942e2fc80a49f620 SHA-1: 15400a16197fe6ef0e1146562c0e552d35c330a0 SHA-256: 109361555b02359e58a409732e403e88a71cac2ff119e072043a01e0b3a1f6ef
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.ru/pify?keyword=afnor+catalogue+formation+2018, is identified as a malicious redirector. The document body also contains numerous links to Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicates maliciousness, and the presence of a malicious redirector points to a phishing or redirection attempt.

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=afnor+catalogue+formation+2018
    • http://files.johnbunyanbaptist.org/uploads/1/3/1/1/131163512/c1761954f49.pdf
    • http://files.diamondavestudios.com/uploads/1/3/1/8/131856380/2039366.pdf
    • http://files.friendsroyalmarsdenchelsea.uk/uploads/1/3/0/9/130969960/1282665.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0441/3430/1848/files/envision_math_workbook_grade_5_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/vanudenasifujikenutelexen.pdf
    • https://cdn.shopify.com/s/files/1/0434/1868/1496/files/2019_bollywood_movies_free_hd.pdf
    • https://cdn.shopify.com/s/files/1/0437/9744/6816/files/nusovesuverafasoroj.pdf
    • https://cdn.shopify.com/s/files/1/0428/4959/9644/files/printable_blank_monthly_calendar.pdf
    • https://cdn.shopify.com/s/files/1/0428/3714/7811/files/vujonemogir.pdf
    • https://cdn.shopify.com/s/files/1/0430/9565/4554/files/85275887230.pdf
    • https://cdn.shopify.com/s/files/1/0428/9114/9471/files/82441201359.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/83327874534.pdf
    • https://cdn.shopify.com/s/files/1/0432/7247/0686/files/67616914367.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_off00004474.bin
9b3a49fd746ac3521d591182996bf83b5e2014cd50e2bd5bbeaaacea3cf79abc
pdf-font-stream PDF embedded font (sfnt) at offset 0x4474 5532 bytes
font_01_sfnt_off0000572a.bin
ec67b36a7ddae746f16d8ea9cafdf9b79e213f5be8183b599dabf4347b71ee92
pdf-font-stream PDF embedded font (sfnt) at offset 0x572A 9544 bytes