Malicious PDF — malware analysis report

Static analysis result for SHA-256 b749238663fa10ed…

MALICIOUS

PDF

46.9 KB Created: 2020-08-19 07:00:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a12c379b52f00428197a90ca0293f008 SHA-1: 052df38936360a6c40a4df85a28a81c137dcaa59 SHA-256: b749238663fa10ed6c85f6f55f8058f6082af177d41f8179849c3e8ce8c09af3
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=video+editor+apps+for+pc'. The document body, though heavily obfuscated, also contains this URL, suggesting the PDF is designed to trick users into clicking it by appearing to offer relevant search results. The presence of numerous other PDF links, many hosted on cdn.shopify.com, indicates a link farm strategy, likely to improve search engine ranking for malicious lures. No scripts were extracted from this sample.

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.
  • 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.
  • 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.cc/pify?keyword=video+editor+apps+for+pc
    • http://files.vivallbright.com/uploads/1/3/0/7/130776218/mimevurosida-fizigeme.pdf
    • https://cdn.shopify.com/s/files/1/0437/8450/3453/files/amana_stove_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/5123/8047/files/asvab_math_questions.pdf
    • https://cdn.shopify.com/s/files/1/0428/8849/5270/files/99435735452.pdf
    • https://cdn.shopify.com/s/files/1/0427/8580/0358/files/84398659860.pdf
    • https://cdn.shopify.com/s/files/1/0435/4356/0351/files/overlord_volume_10.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/80750799566.pdf
    • https://cdn.shopify.com/s/files/1/0438/0108/4064/files/descargar_ccleaner_pro_full_apk.pdf
    • https://cdn.shopify.com/s/files/1/0440/2446/3525/files/marosojejud.pdf
    • https://cdn.shopify.com/s/files/1/0434/0042/9731/files/xikajupifef.pdf
    • https://cdn.shopify.com/s/files/1/0428/0621/4819/files/wobuzutijupapur.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vunumegosuvuvorewufo.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/
    • https://cdn.shopify.com/s/files/1/0428/8849/5270/files/99435735452

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e8c.bin
e50eba1d3ea18e621d9d81fdc26742fd8746aca0b45088abf8850968b4247a9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8C 4764 bytes
font_01_sfnt_off00007ecf.bin
8293ceebf136d04c69b558a93be172890be237ef2b7f65aafcfa58bbab9d50a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ECF 9904 bytes
font_02_sfnt_off0000a0bb.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0BB 4324 bytes

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