Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cad6a1cd5e0dda1…

MALICIOUS

PDF

44.7 KB Created: 2020-08-02 14:47:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c8d2312ffdd7ad88285e8bda5dce60c3 SHA-1: 91f6d17a8a834d08c54603d3ef3d076183c743b9 SHA-256: 0cad6a1cd5e0dda1dfce8495fa355111002947667477e1d29dc14ecdf8c7c53d
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to a redirector service (ttraff.ru) and a large number of PDFs hosted on Shopify. This behavior is indicative of a link farm or SEO manipulation tactic, potentially leading to phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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=convert+kilos+to+pounds In PDF document text
    • http://files.guliagurevich.com/uploads/1/3/0/8/130814666/7526060.pdfIn PDF document text
    • http://files.karencostawriter.com/uploads/1/3/1/4/131484029/7746533.pdfIn PDF document text
    • http://files.pierpontchurch.com/uploads/1/3/0/7/130739951/ximitarovu_jazejukijipax.pdfIn PDF document text
    • http://files.frankmshih.com/uploads/1/3/2/7/132741334/wodadoloki.pdfIn PDF document text
    • http://files.greaterorlandotrn.org/uploads/1/3/1/3/131383533/1074f37e.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/1/0435/2222/8379/files/gejixidipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jazaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7199/6053/files/36481256358.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1910/7480/files/11500179392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9690/7678/files/discovering_geometry_textbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8095/7593/files/tadefebi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1927/9259/files/vogebezileboxibuwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3539/2150/files/zopiraxezuwuzenevugiwizow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/63803572528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18491093394.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7732/8278/files/tixonivufoja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6547/5229/files/92284732926.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 7

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_off00006968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6968 4772 bytes
SHA-256: 262586dd9e7e1eabbfee5fda62ffe2f9f56796a11f9abeeb5e884dcd870387e4
font_01_sfnt_off000079b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79B8 13640 bytes
SHA-256: c2d74a9ac0534dd2e1b33a2315a0cc942b9d9f5278fb4f08fb1fae8679a57227

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