Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f6cdcef36d047dd…

MALICIOUS

PDF

39.6 KB Created: 2020-08-28 09:56:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c2ac92801085dada3bbb84ab33fbf806 SHA-1: 553b459b4431fd0bb6d87ce56c59dddab8e4f531 SHA-256: 6f6cdcef36d047dd52bcb76a861042d4015bed5da57a0b234d1bd77c0a60b547
194 Risk Score

Malware Insights

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

The PDF contains numerous links designed to appear as legitimate book downloads, but many redirect to malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate a clear intent to lure users to potentially harmful sites. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

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.link/pify?keyword=databases+illuminated+3rd+edition+pdf+download In PDF document text
    • http://files.chenale-extensionsllc.com/uploads/1/3/2/6/132695644/1551419.pdfIn PDF document text
    • http://files.beautifulcardcompany.com/uploads/1/3/1/4/131453288/917bbd.pdfIn PDF document text
    • http://wowit.primariuscorpservices.com/uploads/1/3/1/1/131164110/pexifun-dutogituf-gedezodakosene-bigenetuf.pdfIn PDF document text
    • http://masowowu.walkaboutfarm.ca/uploads/1/3/1/0/131070718/xiterowu_lokarax_bapupebe.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/1/0433/4541/2261/files/2887585574.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9981/6090/files/42296635445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0477/3031/files/40557527745.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7272/4900/files/kotokurokodasesomudawus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/4741/3910/files/beginner_english_grammar_test_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9085/3531/files/98620213218.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7709/8913/files/epic_emr_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9278/5818/files/unit_6_test_study_guide_similar_triangles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0027/2792/files/welafirifiweretibip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5114/7676/files/xotolijo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81603963226.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6153/4111/files/hungry_shark_world_hack_apkpure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/laser_cutting_machine_for_sheet_metal.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: chenale-extensionsllc.com 3 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B00 5580 bytes
SHA-256: 2ed1952e4f9de9cee35b9f73da14183a65d8d41927d7334274e59516d7027503
font_01_sfnt_off00006dec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEC 10352 bytes
SHA-256: 7119091bbf8f1346a89d1c4867d5e370dd9cad923bebee2a5fd4d2d2894f5795