Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cb23eb3f7c76a26…

MALICIOUS

PDF

32.6 KB Created: 2020-08-19 08:15:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7a7e0a9e784b763ad0eb790541b3b9d SHA-1: 86e89c002c058500a9680f07c300df43fff45c92 SHA-256: 2cb23eb3f7c76a26d4a48c739a9dffdaa1c9edf269ab2cc2328a17ddb43cc0a6
92 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL 'https://ttraff.ru/pify?keyword=speak+english+around+town+pdf+free' is the primary indicator of this malicious redirection attempt. The document body, though heavily obfuscated, contains text fragments and URLs that align with a social engineering lure for a free PDF. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.ru/pify?keyword=speak+english+around+town+pdf+free
    • http://files.silenthands.net/uploads/1/3/2/7/132712306/xozadobarenabunatag.pdf
    • https://cdn.shopify.com/s/files/1/0429/4295/5676/files/sansui_tv_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/5477/4949/files/como_aprender_a_dibujar_caricaturas.pdf
    • https://cdn.shopify.com/s/files/1/0430/6160/8599/files/combined_gas_law_sample_problems_with_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0433/8188/3030/files/97191906320.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/acta_constitutiva_sociedad_anonima_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0431/8022/8757/files/able2extract_converter_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/4136/3870/files/ansioliticos_en_pediatria.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_off00004246.bin
deadd1a79e9b4f63f273ab12c7d699805b37afae78c0069ba9c481fbbf95bfc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4246 5560 bytes
font_01_sfnt_off00005539.bin
b037ffe3f89c322e60e9c60038f6530526370109dc740f8dd8bff8ea0c0c7a04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5539 9592 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.