Malicious PDF — malware analysis report

Static analysis result for SHA-256 4649126b0d499b82…

MALICIOUS

PDF

37.7 KB Created: 2020-11-05 18:24:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 56d192848fa77b4257ff8d5d6c3dc22c SHA-1: 7bb3a46bdf778b78d7590b38677b7b72b2797ee0 SHA-256: 4649126b0d499b8243994f0e55a69b07e0241ecd35c8f8dfdc2dd4af7a2e85da
76 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a high-severity heuristic firing indicating it's an SEO redirector link used for phishing, pointing to the URL https://trafftec.ru/123?keyword=nuong+heo+quay+da+gion. The ML classifier also strongly flagged this PDF as malicious. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lure users to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/123?keyword=nuong+heo+quay+da+gion PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376379/normal_5f8a92b48c797.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392218/normal_5f9d4791ce67b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383136/normal_5f8de6316d227.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407986/normal_5f9f42012e6ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421342/normal_5f9ef9aa3179d.pdfIn PDF document text
    • https://rijamukomebojo.weebly.com/uploads/1/3/4/5/134585881/wusazo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/xanthars_guide_to_everything_races.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29eb138d-c9bf-456b-a02c-d7a68cb84818/rea_electric_company_marietta_ok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b79745c-3181-4223-bec7-56a0cb1306b1/dodapimozefoziwikiri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd055f54-e830-4f5c-a31b-29762f3bd622/raxegeganotibeniw.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/dolavu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b84cbd2-dfb1-4b1c-b831-e4ea4ecffb12/duval_county_school_calendar_2022.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29e8222e-ead6-4c65-b18e-b04d16f4ffd8/43074210538.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/79407502526.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_off00005836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5836 4980 bytes
SHA-256: 61455d461f8fe610e95c7c175860e1ef5edf66ce904f1b97c5b153306049fd9d
font_01_sfnt_off0000692b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x692B 9684 bytes
SHA-256: 32b76122038d402590d473948c55688b45ecc1074bbc4169bee7126e6f007918

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