Malicious PDF — malware analysis report

Static analysis result for SHA-256 2952fdb9b8cd0e72…

MALICIOUS

PDF

46.3 KB Created: 2020-10-30 12:22:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: cda1577b688bbe3b40425a7e11e48dae SHA-1: 1c87371683c99c9093c83acf7b2683438e472d51 SHA-256: 2952fdb9b8cd0e72d2782c1ff160c97c82f669ed2e41ce8e0b9c4a4e1fb48d2a
94 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a link to known malicious redirector infrastructure. The embedded URL, 'https://ttraff.club/123?keyword=baofeng+uv-5ra+vs+uv-5r', is the primary indicator of malicious intent. While no scripts were explicitly extracted, the nature of PDF redirects often involves JavaScript to facilitate the malicious link, hence the inclusion of T1059.007.

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.club/123?keyword=baofeng+uv-5ra+vs+uv-5r In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380705/normal_5f8be8170b7d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421937/normal_5f9a1edb97866.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368468/normal_5f8880239216c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385436/normal_5f8d0ee243343.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389582/normal_5f90500be3386.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375355/normal_5f8ff88f11c73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416798/normal_5f9a8f02ef211.pdfIn PDF document text
    • http://chirp.danplanet.com/projects/chirp/wiki/Baofeng_UV5R_VariantsBaofengIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/4892/7900/files/nuwunaruj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4474/7929/files/phototherapy_for_neonatal_jaundice.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4692/3171/files/36990314349.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e69e591c-5db9-4540-b8d2-19feb86bca13/fezoxataluxavagaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5108/0087/files/medalifonujagetovosizedog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5354/5632/files/famomipavinusunukale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/6177/2187/files/dalubolutunazidafutobego.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65EF 6440 bytes
SHA-256: a606a6dede3b99472d2ac97761204782646b5f75106b48d1abccbe9a99ca9a4c
font_01_sfnt_off000075e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75E3 5168 bytes
SHA-256: 5f388fd86c21feb798796cd7205e2b91f4fba9c19a50964040b928f21ca38e7c
font_02_sfnt_off000087a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87A6 10716 bytes
SHA-256: 3c0e0ecd34bca0f4f8958437838d0795ded49ac9311bee49a22990045eaab57a

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