Malicious PDF — malware analysis report

Static analysis result for SHA-256 8943b9fcb35fed55…

MALICIOUS

PDF

45.4 KB Created: 2020-08-16 00:54:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a2afa95e5f06b1097bff8591dcc12834 SHA-1: 75781443d0ddcc3b630c7bb9f8684d5f6de18d6c SHA-256: 8943b9fcb35fed55fb88e878834f2fc8a20e9a419132800f875461c241e87e9f
214 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service that ultimately leads to a malicious URL. The heuristic PDF_SEO_LINK_FARM and PDF_MALICIOUS_REDIRECTOR_LINK indicate a link farm designed to lure users. The document body, though heavily obfuscated, contains the malicious URL, suggesting a phishing or scam attempt disguised as a download. No scripts were extracted, but the presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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=yamaha+metronome+app+android In PDF document text
    • http://migewefel.eztaughtme.com/uploads/1/3/0/8/130874493/b71f697.pdfIn PDF document text
    • http://files.sedatedmedical.com/uploads/1/3/1/8/131871586/weloleke-kokezurepoxulad.pdfIn PDF document text
    • http://files.mindset.dbbcso.org/uploads/1/3/1/4/131438509/2540042.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/1/0428/9835/8432/files/99231100330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8670/7876/files/conjunctions_english_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1161/8462/files/penawuba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2816/0417/files/computer_application_in_e_business.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1325/7885/files/17556112036.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2675/0362/files/61902169123.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1409/3986/files/energizer_nimh_battery_charger_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1657/6424/files/xunufolo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8709/4177/files/1920138674.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8651/9208/files/modapabawezarodazufipine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2002/4989/files/apple_keynote_timeline_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0060/2525/files/8998376949.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7546/0515/files/bollywood_actress_photos.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5561 4952 bytes
SHA-256: 6b2afd834f338b5af7efc78ef502db6be5fef80be335e0320192c0ed6fcbc6f7
font_01_sfnt_off00006605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6605 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off00006e93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E93 10452 bytes
SHA-256: ecd8cb1e517446af0c6b96ec8e0322f48b81208fe5a204a201b619e0c08b44f9
font_03_sfnt_off00009238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9238 16344 bytes
SHA-256: 9c47a8ecf7103172530608de19fa11afb8a035ab51042e9cb8c6809f09ebb189

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