Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a9f1666e0966835…

MALICIOUS

PDF

35.7 KB Created: 2020-08-23 18:26:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9974619fbbb619e0b551bcbd516dcda6 SHA-1: 99e48ded1b26ad503d47ecb7b1b9d68e9ad05828 SHA-256: 0a9f1666e09668356f96e47e1330941136fb5474428b0a68869a7aada9e19ab8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and redirects to a known malicious URL, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious. The primary IOC is the redirector URL used in the lure.

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.ru/pify?keyword=past+simple+vs+present+perfect+exercises+pdf In PDF document text
    • http://files.shop.dannysrods.com/uploads/1/3/1/4/131453577/xevepifezoz.pdfIn PDF document text
    • http://files.santinivideo.com/uploads/1/3/1/4/131406140/wagopis-pupuj-newuvega.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/1/0433/9472/8103/files/gulof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6420/5216/files/the_life_of_samuel_johnson_by_james_boswell.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78108387577.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/22650439267.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1000/6940/files/kenmore_he_3_washer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8091/4846/files/jedobutikoroxabi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3628/6877/files/pusuxeritewimujap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0195/3952/files/95178712461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0785/2192/files/52539780770.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6590/8136/files/acuerdos_de_convivencia_preescolar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5109/6981/files/converting_repeating_decimals_to_fractions_worksheets.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 5

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_off00004d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D78 5428 bytes
SHA-256: 41d75e9c567d688f2834b95b34795c648334303f5f2c9d13e3fce47198b9df83
font_01_sfnt_off00005fda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FDA 9868 bytes
SHA-256: 2b18a79b4ff57392e9cb98ddce88816ac0390a0c2eae724c2339f0d168618d32

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