Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c4a9d4e238ce240…

MALICIOUS

PDF

50.6 KB Created: 2020-08-09 01:18:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4d93912ea1170500b3cda8a55036c0cb SHA-1: e24fea7c56abb6e8389c218d4d2d5b9b1027b71a SHA-256: 3c4a9d4e238ce24018ef0ec45ffbeb655a8a6daff64e5032be01c8d4f36eb884
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a mass of external links, including one that redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains text suggesting a lure related to 'McKinsey case study examples pdf'. The primary malicious URL identified is https://ttraff.cc/pify?keyword=mckinsey+case+study+examples+pdf, which is likely used to redirect the user to a further malicious destination. The file was generated by wkhtmltopdf, indicating it's likely a crafted document rather than a standard office file.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=mckinsey+case+study+examples+pdf In PDF document text
    • http://files.uprisingstarsinc.org/uploads/1/3/1/3/131379045/gowofikur.pdfIn PDF document text
    • http://files.consciousdivine.ca/uploads/1/3/1/3/131379759/46e62fb52b7eb.pdfIn PDF document text
    • http://files.mcgrewhouse.org/uploads/1/3/0/8/130814856/7f50eae1.pdfIn PDF document text
    • http://files.utopiatravelonline.com/uploads/1/3/1/0/131070476/regazegedabezilan.pdfIn PDF document text
    • http://files.kylavender.com/uploads/1/3/2/7/132710676/1558531.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/1/0439/7396/8030/files/dafapebanijadobofuravaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0079/9140/files/63837793582.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0677/0843/files/20893310144.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8362/8708/files/54426995021.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/40265763368.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8547/1656/files/59540104452.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/5843942040.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3966/0954/files/metropolitan_opera_rush_tickets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8581/5190/files/xegitopujozafopisoveju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86372263330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9078/8000/files/jijigaguwagojogul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6842/2309/files/13974657852.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D2C 5444 bytes
SHA-256: 29914515e8d4c8299643cef6afc4e5fae7d2a75a88e16345d677d3948e19743b
font_01_sfnt_off00008fc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FC0 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000984d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x984D 10848 bytes
SHA-256: 9987674816660bab4af8fe571e9e0c2474996213ea8443f50753902880e08b05