Malicious PDF — malware analysis report

Static analysis result for SHA-256 961ccbe7137f34b2…

MALICIOUS

PDF

36.3 KB Created: 2020-11-05 18:43:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7f203f645ff121a1e88f202094ff485e SHA-1: 52c3cc1482a86d882df4b5badc96b5386c6679f2 SHA-256: 961ccbe7137f34b25596d89b8e9b7a7ea94beb8ff30f4f075eeaa730d5f1476e
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URI that redirects to a suspicious URL, likely intended to trick the user into downloading or visiting a malicious site. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the presence of an embedded URI and the ML detection suggest a phishing or redirection attempt.

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://traffine.ru/aws?keyword=the+urbz+sims+in+the+city+ps2+iso In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369511/normal_5f8950e60cf4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393772/normal_5f8fa5336345e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372378/normal_5f95f97e07c4c.pdfIn PDF document text
    • https://vajuwapokovis.weebly.com/uploads/1/3/4/3/134361820/kukowowobowu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366359/normal_5f9fbac1ed7d6.pdfIn PDF document text
    • https://talowitutujuf.weebly.com/uploads/1/3/3/9/133999148/pejizefifakan-powujojukavose-kaputifowaduku.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/1/0431/0469/8534/files/nekedurodujuvutoze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/0363/1525/files/kenawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/565944ba-0d51-4e84-be0e-d6ffa712cec1/82822867693.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3166900f-4bd0-4e9f-b754-1364ffb447d9/gubelu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76e299fb-fb0e-4db4-a191-0d619a481979/nursing_diagnosis_for_chf_and_copd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0b00c3b-8269-4eb9-8379-1a5dc16f5df9/campbell_hausfeld_1750_psi_pressure_washer_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bbe05c9-1bb8-4270-a025-02bf6a878148/84677009227.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_off00004e08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E08 5304 bytes
SHA-256: 8d4660aecde5ec44dde9378c564d9fb666985d846a324c9125699378162611bd
font_01_sfnt_off00005ff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF8 10708 bytes
SHA-256: 180021a72bd5be62c9a0ccff3a9f59ff99cdbf65194d610286b0676a21effdb0

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