Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c1d9f26a326f8e4…

MALICIOUS

PDF

66.2 KB Created: 2020-08-31 09:17:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a435521886b309bdebcaf1696c12a142 SHA-1: 4fbaf8be8ac35f90fd6aad669de4b49a0b6d4ba5 SHA-256: 6c1d9f26a326f8e4ad7ded90b0aa08d869d9d4277c47275e93c29703dd93b187
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic identifying a link to a known malicious redirector infrastructure. The document body also contains the URL for this redirector, suggesting an attempt to trick users into downloading content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed 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.com/wix?keyword=%25C3%25A9valuation+tables+de+multiplication+cm2 In 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/1/0429/5730/8063/files/dld_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/48171983009.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ximulomonarosaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6712/0539/files/86010399646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5840/5280/files/jisir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0493/1746/files/dokumen_amdal_hotel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3608/1308/files/zasemutigumodopusag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3663/0422/files/fajureborixelagizotofa.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6116da_ab8e1eefe61c455db17677779e993fdf.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/271e65_eec45bc90f9b4203bfa9e674f945161e.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 4

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ab03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB03 5436 bytes
SHA-256: e7e68acac445fee19179c6973d7c9955bdb8e4d6a610f93e1dae1256f02129a7
font_01_sfnt_off0000bd6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD6D 12476 bytes
SHA-256: 4fa6bcc5cec4229722c83c4173e7f64c95b68c58bb006a2a75c2ade0258662be
font_02_sfnt_off0000e470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE470 16144 bytes
SHA-256: 4935603ab55f76872287563a9769dd1c174124dacc281fee03fb2e864e4c444f

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