Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef67cedea4a9ad98…

MALICIOUS

PDF

51.2 KB Created: 2020-08-04 04:30:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ecd2eb96bbfdc9411b13217ab4d83af4 SHA-1: 91c5d9c2f4c40b6b5c46d352e74ed7cfa35396fe SHA-256: ef67cedea4a9ad9817b096f377f1561f0548873e86404a049953b75d546853b2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a prominent link disguised as a student support attestation, which redirects to a malicious URL (ttraff.cc). This indicates a phishing or social engineering attempt to redirect the user to malicious infrastructure. The PDF also hosts a large number of other PDF links, many hosted on cdn.shopify.com, suggesting a link farm or SEO poisoning tactic to improve search engine ranking for malicious 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/pify?keyword=attestation+de+prise+en+charge+%25C3%25A9tudiant+pdf In PDF document text
    • http://files.upwellings.com/uploads/1/3/1/6/131607174/c3eb020e.pdfIn PDF document text
    • http://files.alphaobsession.com/uploads/1/3/1/8/131856435/5fa44eebfab02.pdfIn PDF document text
    • http://rudunik.myfashion-voyage.com/uploads/1/3/0/8/130814058/tumuw.pdfIn PDF document text
    • http://files.francesmcmahonward.net/uploads/1/3/0/7/130738912/581593.pdfIn PDF document text
    • http://files.andrerowejr.com/uploads/1/3/1/4/131483266/ca4e507432.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/1/0431/5722/5638/files/hodori_los_angeles_ca.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3455/0177/files/konajebawujubuwugekovam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6100/9829/files/47106669810.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0574/7108/files/agriculture_mpsc_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6390/1334/files/54219177300.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3124/8542/files/91472020546.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3028/1377/files/23336193867.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/8453/4180/files/psicologia_de_la_depresion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/7333/4424/files/number_theory_notes_for_bsc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5314/6517/files/mthode_de_franais_alter_ego_5_c1_c2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9549/0721/files/taturuzosomedefabu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8350/5562/files/dawaxafedutitepexa.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_off00008561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8561 5516 bytes
SHA-256: a331f63617a20d13b2c6b3b420474c72ac9d7b502d9350101760942ceccfd96a
font_01_sfnt_off000097e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97E0 12020 bytes
SHA-256: d7f36bfc451ce9aa3ec6a6fb9890868e99900d823c14b2ff2c55d9aec143bf9b

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