Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b97d6e0380a1146…

MALICIOUS

PDF

36.0 KB Created: 2020-08-06 05:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 99695c80319c33fbd6bacea49691cb45 SHA-1: a54b1bdbdfe98eb7f61fb3deaf227cb961daaa07 SHA-256: 2b97d6e0380a11460e510843845f0b74b79824bdd277d62cfcbd66f6965ade30
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=walter+isaacson+leonardo+da+vinci+pdf+free+download', is designed to lure users by appearing to offer a free PDF download of a popular book. The PDF also contains a link farm heuristic, indicating it's part of a larger SEO manipulation effort to distribute malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=walter+isaacson+leonardo+da+vinci+pdf+free+download In PDF document text
    • http://files.chtechlab.com/uploads/1/3/0/7/130775471/415e67d4.pdfIn PDF document text
    • http://files.franklinvolleyballboosters.org/uploads/1/3/1/4/131411281/koxoxavi.pdfIn PDF document text
    • http://files.chungmark.com/uploads/1/3/2/6/132695697/05ec14ffb8d6.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/1/0431/8245/7000/files/tunadelozeto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8762/5369/files/kudodanawisigag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8767/6063/files/zafolesalinatomejon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0831/7850/files/kisuwafufukadino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1416/8480/files/95078096602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2303/1720/files/83221764710.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fimovubonivunab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5308/7911/files/wefafizokifid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7302/7749/files/mevutanonebupokavokom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0360/8214/files/93666819105.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3186/3202/files/53686808099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1446/3394/files/mufoji.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 3

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_off00004f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F39 5316 bytes
SHA-256: d1bf0454f77c6552e3d523072535075bdf95600d380778f022fe744b2860f7fe
font_01_sfnt_off0000617a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x617A 9756 bytes
SHA-256: 7aacacdc1583d1774ee2cab81f019057366232c9b75e6236a3dfd8e44c4fffb3

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