Malicious PDF — malware analysis report

Static analysis result for SHA-256 5291d3d13a111005…

MALICIOUS

PDF

43.3 KB Created: 2020-08-11 00:44:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fb50a1b54ec8ea41c2443f40340e7678 SHA-1: 20cac61e281f1cf03a47b1ad0dd12ecc8fcbcc4b SHA-256: 5291d3d13a11100583e4a66ed01a99e305640225e0a5571ec2ff9fa89bd0a711
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially garbled, includes the title 'Concepts of mass in contemporary physics and philosophy pdf' and a URL that appears to be part of a link farm designed to lure users. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is used for malicious redirection.

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=concepts+of+mass+in+contemporary+physics+and+philosophy+pdf In PDF document text
    • http://files.forestchi.co.uk/uploads/1/3/0/7/130738978/sukogewa-mimefakalusu.pdfIn PDF document text
    • http://files.mtspokaneband.com/uploads/1/3/1/4/131405977/33f6b2d93932.pdfIn PDF document text
    • http://files.merakicolour.com/uploads/1/3/1/4/131407194/mowolitegituw.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/1/0433/3718/7493/files/wubij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4748/3552/files/26797669021.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3461/4688/files/podagidokozelemew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6983/1323/files/boule_de_suif_francais.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4077/5064/files/39163175472.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7219/2669/files/from_uncertainty_to_uncertainty.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8143/3242/files/moto_360_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4184/1571/files/30532454014.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5258/1542/files/32088499879.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/differential_calculus_book_arihant.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2249/0528/files/heel_spur_treatment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5784/8224/files/65473021692.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5804/4823/files/baliwuduzewara.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 3

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_off00006bfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFC 5404 bytes
SHA-256: ed4ec07529b125ef61c8e9eb18017d8a69099f2d0eb849b74bfb66f8db2caa76
font_01_sfnt_off00007e28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E28 9720 bytes
SHA-256: 090b1b1c1995c8a1b39f536154a74d69496e82ca92ba4ba3138d001a3d5731dd

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