Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc9ff3fe6d5c54e0…

MALICIOUS

PDF

54.3 KB Created: 2020-11-08 14:10:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c144e3e35e398a840de1ae26976ad966 SHA-1: 1bffc90f736fbff32bbae151e3f6b5eccfd2721c SHA-256: cc9ff3fe6d5c54e088c3c6308b65ad10f0c1579c2b5cf6bc2bb9130669936bd5
76 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains invisible text and an image lure that redirects to the URL https://trafffi.ru/aws?keyword=invisible+text+generator+copy+and+paste. This URL is flagged as a redirector, suggesting a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the redirection mechanism is a common tactic for initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/aws?keyword=invisible+text+generator+copy+and+paste PDF link annotation
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/warepanadibi-mutowovos-bakorexejav-mirazumepeju.pdfIn PDF document text
    • https://nikokitigo.weebly.com/uploads/1/3/4/5/134500207/1228327.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370076/normal_5f9574c2e4285.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dca4eebe-3e45-49c9-8f77-5a0817fdea05/vivave.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/takuvu.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/ansible_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ad8529b-ca40-4972-bcd8-eaffceba6c1a/15020588496.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7198dfb9-0cda-4112-bf1f-57d500ab8c66/exercicios_de_propagao_de_calor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5e69ba3-f8ae-41d8-be96-02855765bec0/all_animals_photos_with_names_free_d.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5901da89-ee83-4c74-89da-d0b0d50e1fe3/vawusasamujurote.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

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6011 2828 bytes
SHA-256: 4aba2bb845853324476be69e5ed1bf4ff35002942389efac2b843cac1129f0e9
font_01_sfnt_off00006a0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A0C 5548 bytes
SHA-256: f7dc7e59c259747b1666979131364414b04939e1a72309e3dea7c6fa50b6108c
font_02_sfnt_off00007cfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CFA 2188 bytes
SHA-256: 7f8cecf0c8119484865596e178ab38e83afddb85543d768d045797f7bf67b3d0
font_03_sfnt_off000086c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86C2 14784 bytes
SHA-256: 97483fd12b4f733ec2e02e3b58e239ed4cf91496b37a03ad8625dab7cdc000b3
font_04_sfnt_off0000b622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB622 16160 bytes
SHA-256: 9ffc405fbed68b1ed35cf25504b2a045b5802e2074cf99e6920a228075e829fc

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