Malicious PDF — malware analysis report

Static analysis result for SHA-256 42a30dc491d7889e…

MALICIOUS

PDF

48.0 KB Created: 2020-10-30 20:34:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6fbbc0651dabebc425550db67ab1a5f1 SHA-1: 18e4fb56149dab37dabf3bb912ec20df97807d64 SHA-256: 42a30dc491d7889ed4d38b5e47625c506f40816dc3c5f048e12d40576dc01e55
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The embedded URL is likely intended to lead the user to a phishing or malware distribution site.

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.me/123?keyword=usmc+tattoo+policy+ankle In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369518/normal_5f894c32e9ff9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377408/normal_5f9b620bbd284.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/0c55a298-1c99-4019-83dd-15181cf28424/puwarijujalimudekopajere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/860ae959-fc8c-49b6-9408-3072c1e42137/los_origenes_del_totalitarismo_resumen_por_capitulos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3551667a-107e-4e0c-9765-d0923c17c2e4/2708430533.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e251222-68f1-4573-8930-0736d8dd4f4d/makixuwidepavapiwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/163d4fdb-bc96-4769-8f76-394fe3b9cdad/27347014705.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/vigantol_bayer.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/utah_department_of_natural_resources_jobs.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/alter_ego_1_guide_pedagogique.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/punamulakekek.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_off00007dd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD8 5140 bytes
SHA-256: 8f2efd8c606252ef2d044c8b735cc98424168f4f51ffda5ca9983edc11a84ec2
font_01_sfnt_off00008f55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F55 10620 bytes
SHA-256: 37416bd698423c5796b8cacbe42959129ab5cdcf259d1095a589d1dd0da26cdd

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