Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec8237de0d288135…

MALICIOUS

PDF

28.9 KB Created: 2020-08-18 16:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 219aab808cd208ffecc002bfe4b5eb6e SHA-1: 27d8a826877698652d069f55f11e8c134a7809b5 SHA-256: ec8237de0d2881358bf72b0e31709f61a00eda78976b959c17e21ea0fa241c98
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lure users into clicking through to potentially harmful content. The document body, though heavily obfuscated, appears to reference the same URL and a keyword related to a product manual, suggesting a social engineering pretext. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.com/pify?keyword=audio+technica+ath+m50x+bluetooth+manual
    • http://files.lorriemarilyn.ca/uploads/1/3/0/7/130740458/9f451c6c88.pdf
    • https://cdn.shopify.com/s/files/1/0437/1801/7175/files/ragepim.pdf
    • https://cdn.shopify.com/s/files/1/0433/0582/8520/files/91053086869.pdf
    • https://cdn.shopify.com/s/files/1/0428/2207/4534/files/25968511840.pdf
    • https://cdn.shopify.com/s/files/1/0437/6897/1418/files/vowakanenugurusapefuwad.pdf
    • https://cdn.shopify.com/s/files/1/0434/0649/1797/files/ejercicios_de_contabilidad_basica_resueltos_asientos.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1854/files/38974440288.pdf
    • https://cdn.shopify.com/s/files/1/0430/6019/9573/files/brighton_college_abu_dhabi_uniform_list.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_off0000384a.bin
32b783b7180fb81986cf1ea02429853c72e930d1b7451a400b50e0077e24ed5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x384A 5368 bytes
font_01_sfnt_off00004a63.bin
27845108eec30ec5cb0850d41fd7acafbae264b1b73e2e32c14bb4830a0e4a16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A63 8536 bytes

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