Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4de4092106324cd…

MALICIOUS

PDF

32.0 KB Created: 2020-08-30 20:55:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10e59591e424eb3cb4bc46964739c034 SHA-1: 8c2c201f3bdab41473b36bb20aebdd52ce55a2ba SHA-256: b4de4092106324cd8651f205af5a4d9ea06fda503874dc43fa797937757f61fe
152 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure at 'https://ttraff.com/wix?keyword=drake+ft+21+savage+download'. The document body, though heavily obfuscated, also contains this URL and other links to Shopify domains, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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.com/wix?keyword=drake+ft+21+savage+download
    • https://cdn.shopify.com/s/files/1/0430/9798/1089/files/associative_memory_in_neural_network.pdf
    • https://cdn.shopify.com/s/files/1/0435/5211/2808/files/accounting_information_systems_romney_12th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0438/6455/5680/files/cultural_diffusion_theory.pdf
    • https://cdn.shopify.com/s/files/1/0438/2025/3344/files/badevajirodafusoralaxix.pdf
    • https://cdn.shopify.com/s/files/1/0433/1349/6222/files/vukugirefaguzixamel.pdf
    • https://static.usrfiles.com/ugd/e6092c_3aff33070f0943b58405aad5a76b57c8.pdf
    • https://static.usrfiles.com/ugd/3be3a7_3de341282d4e446398a5ad95c5681c11.pdf
    • https://static.usrfiles.com/ugd/3eed2b_0de05c3825ea4e3e84661db250fd8c93.pdf
    • https://cdn.shopify.com/s/files/1/0437/9633/2705/files/tebemijexejugaf.pdf
    • https://cdn.shopify.com/s/files/1/0435/1826/3448/files/telerik_kendo_ui_spreadsheet.pdf
    • https://cdn.shopify.com/s/files/1/0459/6485/3408/files/lonani.pdf
    • https://cdn.shopify.com/s/files/1/0434/8264/4642/files/xipivor.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000407a.bin
7c6f60ad1fb0d5d193a6b82b8b51b0971f95686ca1e8c6e8da09e21e550a15e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x407A 5476 bytes
font_01_sfnt_off0000534c.bin
6efa27fcde77b3d3f32de1bc5c1ca3ee809ce4a6621b588c9f556e0eb68ce901
pdf-font-stream PDF embedded font (sfnt) at offset 0x534C 9424 bytes