Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cf29164c0a917e3…

MALICIOUS

PDF

42.7 KB Created: 2020-09-16 22:40:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 99de9bded78635ce27ab4f230fdad38d SHA-1: b5065998871a39e405956ffd0fda188640a1e6ac SHA-256: 9cf29164c0a917e37205b8eaea5fa33676d2289a8729175cdaa08963980ac7ec
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF file contains a lure for an educational worksheet, but embeds a link to a known malicious redirector. The PDF also contains a large number of external links, characteristic of a link farm, which is a common tactic for SEO poisoning or distributing malware. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that the embedded links are intended for malicious purposes.

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://ttraff.club/wix?keyword=combining+sentences+worksheet+8th+grade In PDF document text
    • http://senibexa.merrinandsondecorators.co.uk/uploads/1/3/1/3/131379434/3925959.pdfIn PDF document text
    • http://sulano.carrshieldcampingbarn.co.uk/uploads/1/3/1/3/131397997/mixulegidejola.pdfIn PDF document text
    • http://files.vt-iorg.org/uploads/1/3/1/4/131411688/1100295.pdfIn PDF document text
    • http://binalom.vinoetamicis.com/uploads/1/3/1/4/131406821/1425fc6c8d4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://621b070d-d0a3-462f-9eff-d17f93e7d96c.filesusr.com/ugd/784815_dddf5e5bcd7848cca30b51106cb94d3d.pdf?index=trueIn PDF document text
    • https://47e8dd91-6b58-4be5-bf1f-e0e1b981c1e2.filesusr.com/ugd/95089d_df2f087e2516476284f5b037242d03c6.pdf?index=trueIn PDF document text
    • https://618af936-ffb8-4f21-9eb4-fc652dae1b28.filesusr.com/ugd/3d514e_3ae72a779a264acbac3d114ab4c90e4c.pdf?index=trueIn PDF document text
    • https://38d86348-fbd3-4211-84de-ebcd8c8f7fc5.filesusr.com/ugd/12dc78_993d587f131b4a98810f09c76d9df984.pdf?index=trueIn PDF document text
    • https://54e2cae4-d495-4a22-bda2-8386d308af15.filesusr.com/ugd/8716ab_add0aa4c48504447857384c709f1cee8.pdf?index=trueIn PDF document text
    • https://3ea8dea0-b37d-49d8-b76b-2c455cf624dd.filesusr.com/ugd/8a05ec_06331ebacb78475fb24061d89fb0652a.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4658/3976/files/cracked_apk_files.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4392/9757/files/nowararaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/nafomoba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8814/2743/files/55745468111.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 8

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_off00006814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6814 5716 bytes
SHA-256: ef8ac68d4d1d4fa4012b3d878b85dbced89373e98e6478d819df67c9a1957a59
font_01_sfnt_off00007b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6F 10132 bytes
SHA-256: 621e24b701bf30ce644f137ed9f78ee9d65ce9ea7ecc746f2f21bcaec85e56b4

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