Malicious PDF — malware analysis report

Static analysis result for SHA-256 57477c191fc7c5b1…

MALICIOUS

PDF

41.2 KB Created: 2020-11-04 23:10:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e21288d1518781e00a04b00f9b30dfc4 SHA-1: 2622b31d9d29c341aafa92166aecda1d6242b920 SHA-256: 57477c191fc7c5b137631a94d3fe4a63f7121fbd7ccb7752b1354938d3359d14
114 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) lure. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • 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) 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.link/123?keyword=marshalltown+courthouse+ia In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368997/normal_5f8d7c3d2c58a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369311/normal_5f892323296af.pdfIn PDF document text
    • https://gonoloxezejuje.weebly.com/uploads/1/3/1/4/131410007/milosuj_zuvige.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370529/normal_5fa0f715a3b55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385417/normal_5f98523e319f2.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/21f29b1d-47d5-45ee-931e-332d202118ca/9158769638.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/1990571119.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/75335468692.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/canon_imageclass_mf4880dw_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0a7b255-7b87-4ffa-a7df-38028b18df83/16325237145.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_off000060df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DF 4984 bytes
SHA-256: 354fc32f0d806fcd7128867954165c423f9fb137f96039490a5fb86d88d075b3
font_01_sfnt_off000071e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71E7 11392 bytes
SHA-256: c4fb960ed08b3f0aa98afd87069b5f9737f0cb8b2fbd3d52ac4b3a6e09dd19ea