Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ec1611e99f2d48d…

MALICIOUS

PDF

40.5 KB Created: 2020-11-01 22:52:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 018cc09e3c45f37f4f8e7e267668513a SHA-1: 776c3644eeff2e4a272c137fa2fd8a485b195b99 SHA-256: 9ec1611e99f2d48da180098d7eb77c4095abca1c220d1fe90c5ebf70e737bbcf
134 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link and a fake CAPTCHA prompt, indicating a social engineering attempt to lure the user to a malicious site. The embedded URL, https://ttraff.club/123?keyword=john+legend+all+of+me+piano+sheet+music+pdf, is flagged as malicious and is the primary IOC. The document body, though heavily obfuscated, contains references to the same URL, reinforcing its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.club/123?keyword=john+legend+all+of+me+piano+sheet+music+pdf In PDF document text
    • https://dawugagulinejud.weebly.com/uploads/1/3/4/3/134368664/4106226.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411273/normal_5f982afeec605.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373241/normal_5f98d65dec445.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390057/normal_5f98bafed6c0e.pdfIn PDF document text
    • https://pupiwikupexi.weebly.com/uploads/1/3/4/3/134348736/8d146.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/6697661b-98e3-484f-b456-5658d1b8ccbd/lukapenuxeraragi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7050747f-3f3a-4b62-b9d5-d5a51be6afb6/nowive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9434/3829/files/15378463615.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2836/3439/files/91356890109.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d44641c-7d42-41b6-88c4-2ed4263aa148/5926547940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e082c9ef-0f98-43e0-b383-c96433ae2012/tracteur_renault_n72_fiche_technique.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D6F 5464 bytes
SHA-256: 717754871691492e87b7737bfe4cc188250b163b7b3d0d132894a80d528b6097
font_01_sfnt_off00006fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE8 11016 bytes
SHA-256: b156fdedb5b25c0450173b7152b6a92ae249c0d02e492ceef79f9b416f00e188

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