Malicious PDF — malware analysis report

Static analysis result for SHA-256 9410e50d080dab36…

MALICIOUS

PDF

41.5 KB Created: 2020-11-06 02:01:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-12
MD5: 48ef4bf909eb4593b980527a34dbddb6 SHA-1: b8904d111973da725f77fd057c2069d44cc2d2d2 SHA-256: 9410e50d080dab361d5f270d3fba120ed7fe0c662656404401bb7083afea6c82
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to a redirector service identified as malicious. The document body, though heavily obfuscated, contains text related to a 'customs broker exam study guide' and a URL that appears to be part of an SEO link farm designed to attract users. The ML classifier strongly indicates maliciousness, and the presence of redirector links suggests an attempt to lead the user to a malicious site.

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://traffmen.ru/wb?keyword=customs%20broker%20exam%20study%20guide%20pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f935a6c5cd93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f8756c6d04f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423171/normal_5fa07d2be453d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403121/normal_5f958bb0d1c73.pdfIn PDF document text
    • https://sofowalomutupal.weebly.com/uploads/1/3/4/3/134310420/547943.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/1/0476/6993/6294/files/song_running_bear_sonny_james.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/donald_gennaro_death.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/en_la_disco.com_musica_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/50_sharp_roku_tv_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/617423ac-bc09-4418-8ada-3236b4ba92a7/sanosudofu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cb0775c-3ee5-46c9-b2af-1c51ce3c979d/naluvidivu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C0 5608 bytes
SHA-256: 4073178f0d0ad7ff999722e957e0568e8a29e93c7d86c3915c95a968ecea74f1
font_01_sfnt_off000075c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75C7 10392 bytes
SHA-256: 60f85488f679465f3957666f84e9e3d7bb4acc97e0ba1303e3bff85615303105

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