Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef38a730a9b110a2…

MALICIOUS

PDF

40.9 KB Created: 2020-11-05 02:42:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: f843e2c0cc1f58607b3105a64329e30a SHA-1: d85efc79b64499729194410bff2aec419e5e17e3 SHA-256: ef38a730a9b110a2282b96c00c7dc1744b334d5e3da9b25f88441b6f04ca5ae7
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. 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 3

  • 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.
  • 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.com/123?keyword=at+home+dallas+area In PDF document text
    • https://cdn-cms.f-static.net/uploads/4411691/normal_5f986e029a855.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5f88424392894.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418383/normal_5f9747e7a7e8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448713/normal_5fa10326cddbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421624/normal_5fa18ef53c439.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tetazino/fukijerakironutuzo.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/21184441085.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d87a806-eb98-4e91-8f9c-7b5c17891ad3/42718673393.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/72265236451.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/463cf7dc-b994-4e49-a39c-9556f08a0f2f/67831809470.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/nutap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4660a58-7306-4640-80e1-69a47382a33c/marivaronegobusokomexafe.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/tidaragogili.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/zuxadotilezakowafisevij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4233f8b5-9a17-46a9-9f03-a76ec66c54e1/dabupofenafopivapadaveze.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/heritage_academy_laveen_jobs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/505a9dec-e49e-4fc8-ac6a-f944bf0721cb/fojorevakirutunapuvel.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_off0000625e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625E 5052 bytes
SHA-256: 89dd6c85d737634830ac02bb7243db4733bd70b92bca52eecea320a99d9415a6
font_01_sfnt_off00007358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7358 10484 bytes
SHA-256: fe9d3e7b12587cb386ccaef12021148bd8ff11327b5223e64929dc17e614c1d7

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