Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef129eaa7d4acb15…

MALICIOUS

PDF

39.9 KB Created: 2020-11-08 10:36:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a42af055131d926c9cf1a5e9643ee5ac SHA-1: 6ecd31d9393501656062af82f166203ab028bc14 SHA-256: ef129eaa7d4acb15819363c5e3f93a6558a1f64cabf0cf2db8197dcd56b95005
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 pointing to 'traffking.ru', which is likely a lure to a malicious site. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the ML detection suggest this document is designed to redirect users to a potentially harmful resource, possibly for phishing or malware delivery.

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://traffking.ru/123?keyword=college+algebra+answers+solve In PDF document text
    • https://wofixoxabovu.weebly.com/uploads/1/3/4/5/134524794/4427616.pdfIn PDF document text
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/nowafozosuzekuz-lezij-furakujaren-taxuw.pdfIn PDF document text
    • https://xumokiregiw.weebly.com/uploads/1/3/4/2/134266049/madakonu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415754/normal_5f9525631606d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393911/normal_5f93abb914d24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407989/normal_5f96d5d422140.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366969/normal_5f8b7d9cc2d57.pdfIn PDF document text
    • https://xonunate.weebly.com/uploads/1/3/4/4/134478107/jetarufufotelo_sapuvexus_pomuno_zafupu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370056/normal_5f882ec31ed6f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/89e2c3df-1e14-45a5-be89-6fe38e130bc7/50524174671.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72cc265a-2199-4904-83bb-9e4872e3e620/sims_3_deaths_and_ghosts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b39b6ab1-bca1-41aa-b5fa-388a4c3d8793/guzotususunajam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f40556d7-2483-4934-9325-735addae2080/62018440514.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_off00005d72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D72 5048 bytes
SHA-256: c0a19f443ba12d47375f7d5238e654775e7e57ee434e74c12fb8cc1128481636
font_01_sfnt_off00006ec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC5 10764 bytes
SHA-256: a07055bb287c68b50f06d88aeda29c720da25b081f68dd4509cbaf15ed3ccd8b

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