Malicious PDF — malware analysis report

Static analysis result for SHA-256 95d36b9f7ece29bd…

MALICIOUS

PDF

40.1 KB Created: 2020-10-30 05:34:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 85932d9fa22dc153d13c35103c2bed63 SHA-1: 9d44f3369d4e1092d745752a584d1e159b6f1643 SHA-256: 95d36b9f7ece29bd6589e3bb458d6fb11d8a3041048d38cd58ffbc28704df80c
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it redirects to known malicious infrastructure. The document body also contains the URL https://ggtraff.ru/123?keyword=engineering+management+pdf+download, suggesting a lure for users seeking specific documents. The presence of many external PDF links points to a link farm or SEO manipulation tactic.

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://ggtraff.ru/123?keyword=engineering+management+pdf+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370267/normal_5f8bd69857d80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389797/normal_5f9b4165cdeeb.pdfIn PDF document text
    • https://fupesovuzej.weebly.com/uploads/1/3/4/0/134016868/c5ff102b4.pdfIn PDF document text
    • https://fijapirugonobi.weebly.com/uploads/1/3/4/3/134315317/zitikinovixukiresi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369179/normal_5f87acaa83d25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f8929781bf87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374704/normal_5f97d36c7b2db.pdfIn PDF document text
    • https://zebamejiwan.weebly.com/uploads/1/3/4/3/134312785/babogon_xobivubedasim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4351/8126/files/tujakujejuloxirut.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/51131868336.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/aseguranzas_de_carros_en_california.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/42742310752.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCD 5232 bytes
SHA-256: d70af8a225da9df1252bc21c2ceaced7f1e39e1ed920b838dce2f688121eb2b6
font_01_sfnt_off0000719c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x719C 9868 bytes
SHA-256: 607a102b98518525ecdacf004ff32180f7abd03bcee3cdd39640bdfe1d7eb02a

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