Malicious PDF — malware analysis report

Static analysis result for SHA-256 69661a4e3fea0d96…

MALICIOUS

PDF

41.3 KB Created: 2020-08-09 16:37:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 10325d2f62f23f325a17cd1aceca2597 SHA-1: 1a79f0808ee3d2ee29590826230cb01d3f1747e8 SHA-256: 69661a4e3fea0d96edfd49f7995c973fb61da6b7f204cd2745649e13b2cb7676
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and a redirector URL, indicating a phishing or scam attempt disguised as a free PDF reader download. The ML classifier strongly flagged this PDF as malicious, and heuristics confirm it links to known malicious redirector infrastructure. The document body text and embedded URLs support the lure of obtaining a 'free pdf reader'.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.cc/pify?keyword=top+free+pdf+reader+for+android In PDF document text
    • http://jurore.mytornradiofud2modelproject.com/uploads/1/3/2/8/132815002/rebegilaninopawamujo.pdfIn PDF document text
    • http://files.ajportablebuildings.com/uploads/1/3/1/3/131378950/moxoxaren_ranefewope_dodasozam_lobavuviwudemo.pdfIn PDF document text
    • http://files.sacredtellings.com/uploads/1/3/1/0/131071035/ximofevafam.pdfIn PDF document text
    • http://files.hilarymccarthyart.com/uploads/1/3/1/3/131379844/gowexudevikefov.pdfIn PDF document text
    • http://files.communitychurchsheppey.com/uploads/1/3/0/8/130874318/49948dc.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/1/0434/8212/0357/files/problem_solving_creative_thinking_and_decision_making.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5409/4753/files/guzasudu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4832/1702/files/35197574152.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4234/6907/files/pitinekig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuwuvedalolavotidexetugom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6020/8540/files/54798891698.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3428/0099/files/48452879429.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/68872568881.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3797/4950/files/74009766616.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5730/8063/files/tiwajewuraza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3349/3658/files/86673908153.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_off0000661c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x661C 4772 bytes
SHA-256: f4e18e8b49c658a15397035572270380200e32d089c564e1a67921f08ad8e3cd
font_01_sfnt_off00007668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7668 10052 bytes
SHA-256: 9e66d2dba63d79a90f363d7c9fb65e329d00ff1dd28012a880f050bb6d65eccd

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