Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c5d631769f7e23c…

MALICIOUS

PDF

43.7 KB Created: 2020-08-06 11:48:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 840d9d7f933a85120728762f8c4ff726 SHA-1: d79b8825b92418f2fc6d3153c084b0c43eaf7acb SHA-256: 7c5d631769f7e23c5dbe26b79672b7fb4a2c0a07b71643e927f230d64bb9e7d0
194 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to a redirector service that is known to host malicious content. The document body, though obfuscated, contains text suggesting it is lecture notes, a common lure for phishing. The primary malicious URL identified is https://ttraff.cc/pify?keyword=procurement+and+supply+chain+management+lecture+notes+pdf, which is flagged as a malicious redirector.

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=procurement+and+supply+chain+management+lecture+notes+pdf In PDF document text
    • http://kikakarib.ikhenkle.com/uploads/1/3/2/6/132683014/gupejefanizame-xolekegaror-fovifofil.pdfIn PDF document text
    • http://files.hempsteadtrackandfield.com/uploads/1/3/1/4/131483445/lotaxoje_nomipidobuva.pdfIn PDF document text
    • http://files.wallstreetwhizz.com/uploads/1/3/0/9/130969746/2606151.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/1/0440/2728/1558/files/563018742.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/zavenomalofalejuloz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7188/7767/files/game_of_life_quarter_life_crisis_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6891/4838/files/wasolaraw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6851/3686/files/cryptography_theory_and_practice_third_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1970/6269/files/posujekuwimenememozajewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/vewanoxakodobarutegokatew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1959/7981/files/ziwifiba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2625/0917/files/xanuvojifugikezuvizifo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2823/1830/files/biological_science_scott_freeman.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7968/6549/files/pofexusulagelij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6769/5511/files/pozorivunofatoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4149/6981/files/aprendizaje_basado_en_proyectos_secundaria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6083/8050/files/32229490053.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
🗂 Part of campaign: automobiliabybuck.com 7 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B61 5672 bytes
SHA-256: 8cdc67776cbe14cc2649c0d49b46cda59341c61813268ea5837753e4251cc02c
font_01_sfnt_off00007e89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E89 10228 bytes
SHA-256: 23efeef74b8ccead0b47d227aa9f32e9390007290e840711bb1e9523c4c0ef4a