Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd9edb47f00440c9…

MALICIOUS

PDF

32.5 KB Created: 2020-08-17 00:43:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b60efa8100cd7963f47a8959cfeb1435 SHA-1: 6b81325c57d4022475b95339ff215c6210086a8c SHA-256: dd9edb47f00440c974b098cbf45a76269e1ee2a8d73a6613e3773a9be1402852
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, disguised as a "College Board PSAT Answer Key". The document body and heuristics indicate a lure to external content. The presence of numerous embedded links, many pointing to Shopify domains, suggests an attempt to obscure the malicious redirector or create a link farm. The ML classifier strongly flagged this PDF as malicious.

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=college+board+psat+answer+key In PDF document text
    • http://files.dylanhurwitz.com/uploads/1/3/0/7/130739699/migizod-supurelejevibi.pdfIn PDF document text
    • http://files.nforchestra.org/uploads/1/3/1/8/131856129/bimudatujirivaviw.pdfIn PDF document text
    • http://raduk.ivyouthsymphony.org/uploads/1/3/2/7/132710507/9274150520b.pdfIn PDF document text
    • http://files.campmujigae.org/uploads/1/3/1/8/131871518/lutunasadelobu.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/1/0431/5352/2850/files/30989919894.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6043/6896/files/biology_miller_and_levine_chapter_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7870/3511/files/95489191587.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5435/6897/files/84982911390.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4088/9240/files/32265159443.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8246/4928/files/89998341767.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tazoxusejeko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/9751/0308/files/33075561144.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6288/6549/files/formula_of_maths_of_10th_class.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4921/3349/files/assam_tet_exam_centre.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9123/7791/files/operational_amplifier_and_linear_integrated_circuits.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7237/3414/files/5442057435.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/47406006068.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_off000044cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44CD 5432 bytes
SHA-256: 731dc1110aaf59440878ef72b616f7c02409a33fe52eab78d50dccf574c46070
font_01_sfnt_off0000576a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x576A 8756 bytes
SHA-256: 64b62adec33a8832f8a175c35d2d156d48e74320ad66ef390a6d69cbc4077d17

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