Malicious PDF — malware analysis report

Static analysis result for SHA-256 656f44a31e2f456b…

MALICIOUS

PDF

40.3 KB Created: 2020-08-01 05:13:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2a7fdb7f848ff04fa0d4107af2f0190e SHA-1: 7d98b90632e13a9e2a9e00bb771168732d537a54 SHA-256: 656f44a31e2f456bdd69c8f88ddd9e956e9967f1f5963fe104ef3a8adad08385
194 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a redirector service. The primary malicious link, 'https://ttraff.cc/wb?keyword=alphabet%20letters%20worksheet', is designed to lure users into clicking it under the guise of an educational resource. The document's structure and the presence of numerous external links suggest an attempt to generate traffic or lead users to potentially harmful content.

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/wb?keyword=alphabet%20letters%20worksheet In PDF document text
    • http://files.vontoba.com/uploads/1/3/1/4/131438741/zipunux.pdfIn PDF document text
    • http://files.notesinthemargin.co.uk/uploads/1/3/0/9/130969357/xubawibinawagaduduze.pdfIn PDF document text
    • http://files.ccla-ct.org/uploads/1/3/2/6/132681901/rejil.pdfIn PDF document text
    • http://files.hilltoppertennis.com/uploads/1/3/0/9/130970004/tikazizetugixo_lanubegugopo_barat.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/1/0432/2725/0850/files/96006838601.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2261/3654/files/32031201842.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9234/4993/files/tajut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6439/2866/files/54920835118.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5783/1326/files/vitarifuwazajeropeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zodotuxufaliga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3885/0719/files/don_t_ride_the_white_horse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5486/6333/files/48104463785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/74916612159.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/zelizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9258/2293/files/kukalimejamo.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_off00006102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6102 5192 bytes
SHA-256: d4eba30f1d5a706867b5a07bfc90cdd618715449b8efe20258f43442a8bf275b
font_01_sfnt_off000072ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72AD 9852 bytes
SHA-256: 93b35e3c006277abe2443260f28e9e976fe3b41188c5100028808bca6712f123

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