Malicious PDF — malware analysis report

Static analysis result for SHA-256 85d0a18d79984c71…

MALICIOUS

PDF

44.0 KB Created: 2020-07-30 13:14:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d09a08da46e2c3546891c205abc0e35c SHA-1: f76ff484dbe90f1dd15e2fb638afc763a65f1f3b SHA-256: 85d0a18d79984c71222b311dacd2b4a75ac650f28625bc93ff04e2aac219da7e
194 Risk Score

Malware Insights

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

This PDF file contains numerous links designed to create a link farm, redirecting users through malicious infrastructure. The primary redirector URL is identified as malicious. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically. The ML classifier strongly indicates maliciousness.

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.ru/pify?keyword=agendas+alternatives+and+public+policies+pdf+download In PDF document text
    • http://files.easternshoreyoungadults.com/uploads/1/3/1/3/131383964/515006.pdfIn PDF document text
    • http://files.nicolezeng.com/uploads/1/3/2/7/132712163/4401912.pdfIn PDF document text
    • http://files.bridgetmckennaart.com/uploads/1/3/1/3/131379396/bevitojodageva.pdfIn PDF document text
    • http://files.tortoisecove.com/uploads/1/3/1/8/131856852/nefut.pdfIn PDF document text
    • http://files.simplydivinesuds.com/uploads/1/3/1/4/131407812/23f3d849.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/1/0433/0687/7080/files/lorirazapevimixawas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9480/2589/files/7731618881.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7659/1509/files/tofolag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4509/3533/files/veletogirenoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5217/0406/files/gimulatesegugifemi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9235/1907/files/3254332759.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4355/2416/files/26969203709.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/binapoximujasulufegoxapal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4390/4927/files/4421307440.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4513/3215/files/sifil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/pogalaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/93981457584.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C44 5484 bytes
SHA-256: 01d470a622ec3d4054dccfefe98f2efca1bed5a36968e829435d9c3ed3f75288
font_01_sfnt_off00007f02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F02 10412 bytes
SHA-256: dc4fc5af455256e0166f6346c4da13b81b7d88b534ef011a33504a0c91e3609a

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