Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a91da42cb2d19be…

MALICIOUS

PDF

44.4 KB Created: 2020-08-26 13:19:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bd483cc11c7a08e21080ca2504b2cd77 SHA-1: 1a44d673dade8adb0fa4240b641db435f1982593 SHA-256: 6a91da42cb2d19bec0fc860a68316ad0f2d7c1452d7d86b7d538741db8da7407
134 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains text that appears to be a lure for a free download. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the redirector URL used to funnel victims to a malicious site.

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.
  • 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=reheat+honey+baked+ham+turkey+breast In PDF document text
    • http://files.neplus.co/uploads/1/3/2/7/132740204/rakomuj.pdfIn PDF document text
    • http://lomodi.marchdrumcorps.com/uploads/1/3/0/7/130776783/waxulutonefobedeza.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/1/0429/8250/6647/files/29236386296.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0933/5715/files/56399925340.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5845/3928/files/augusto_dos_anjos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80023348890.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2761/1300/files/et_misericordia_magnificat_bach.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1966/4540/files/15627933930.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4531/3941/files/zagopula.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 6

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_off00007019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7019 5344 bytes
SHA-256: 1ac96579524cc3aaeca6ec066990123f47b0c06ef4387101e61524a69fe417d6
font_01_sfnt_off00008218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8218 10196 bytes
SHA-256: 78be34f9203764fce81a7545c474dac885d83c34bd2b7f2408ad80b5230e9b01

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