Malicious PDF — malware analysis report

Static analysis result for SHA-256 bebb326428f7be5f…

MALICIOUS

PDF

50.1 KB Created: 2020-09-17 19:24:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e146943e4ff2830f77929e8324d9ccdc SHA-1: adaa4db50091740b52c379f8c8c051e51073fb7a SHA-256: bebb326428f7be5f8f9858a20f44db9b3d029b0f23802ea9b849eeb07f4368a4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=animal+product+manual'. This indicates the document's primary purpose is to lure the user to a potentially harmful external site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of the malicious URL and the PDF structure itself are sufficient indicators of 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=animal+product+manual
    • https://b10ef1d3-7719-4a41-ab80-d8d8779d9799.filesusr.com/ugd/15cd4d_4efd94d162694a02b8e4bb1127413e0f.pdf?index=true
    • https://c93bd3b5-a92a-4281-ac8d-919fa6ac8dea.filesusr.com/ugd/4fb05f_cf419a56bc4941bf9bda75413fede8a8.pdf?index=true
    • https://a95c33bc-510e-458d-95ea-1070e2cf1ffa.filesusr.com/ugd/d61b30_5ca4a52b8927469eb8c0f28640a40fba.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0462/0409/2569/files/4570380787.pdf
    • https://cdn.shopify.com/s/files/1/0433/4659/1903/files/45482612568.pdf
    • https://2863d71d-ac53-4707-bb2b-c25f02c87cd3.filesusr.com/ugd/913720_f4e65481fc00464fa1f15caf9e2affe9.pdf?index=true
    • https://d3caf7c6-2e8e-4fa8-afb5-228ca9d4e38d.filesusr.com/ugd/143c98_0e08a2f55a3a4cfd81f0150e74cbcedc.pdf?index=true
    • https://8b111ec5-de0d-4ca6-a035-69a1580b3c4d.filesusr.com/ugd/a771bd_150780a82fb94a82b334ff50b7c9a2be.pdf?index=true
    • https://7adcd7f0-250d-4776-a04e-a2ac126d1a73.filesusr.com/ugd/10cedf_e9c8c8af5906403b9c296666976ab461.pdf?index=true
    • https://eaa007c1-e1cb-4705-a7dc-a8d659063736.filesusr.com/ugd/fedf23_c3eda51808ea42e5ac5c76d137fc9506.pdf?index=true
    • https://1fdcd5ce-1fbf-45e9-ba4f-2796311ecd03.filesusr.com/ugd/911c12_8316dd365b31419ba5112090e85257f0.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000704b.bin
b108a7759d56838f987c2e96d33d3eab9d73f1286e15103c81d20d0a5bd0da55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x704B 4792 bytes
font_01_sfnt_off00008061.bin
c0844e933e9cd6369980620d343e3e4888e3125f7fec6bb10c245c6e149c4bbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8061 14652 bytes
font_02_sfnt_off0000ada1.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADA1 4324 bytes

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