Malicious PDF — malware analysis report

Static analysis result for SHA-256 76f7d9a4e7bbe7be…

MALICIOUS

PDF

29.0 KB Created: 2020-09-02 19:06:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0030a2369ed5bb97f43549a2e136107e SHA-1: d7067a642041eea4b148de095b92cf5f766c9d2c SHA-256: 76f7d9a4e7bbe7bef2ff6095090264b06cf7434f27c6389dca2d67940378d19b
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector infrastructure, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The ML classifier also strongly flagged this PDF as malicious. The embedded URL https://ttraff.ru/pify?keyword=tennis+game+3d is the primary indicator of malicious intent, likely leading to a phishing page or malware download.

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.ru/pify?keyword=tennis+game+3d
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/4809/2323/files/44553840478.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6735074847.pdf
    • https://cdn.shopify.com/s/files/1/0447/7576/8221/files/jipisilabezetivemidixu.pdf
    • https://cdn.shopify.com/s/files/1/0436/1771/4334/files/alimentacion_saludable_en_la_adolescencia.pdf
    • https://static.usrfiles.com/ugd/4b7290_d3999fe2a43f4816ae7226a29897ac18.pdf
    • https://static.usrfiles.com/ugd/234f58_c610fbcc1a0a43ee89efb93d1367dae5.pdf
    • https://static.usrfiles.com/ugd/b8c837_14c275f930da4d76a72b6801cb0b5200.pdf
    • https://static.usrfiles.com/ugd/b88e3d_cf04f223696642b98f93287e15da690a.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000038e6.bin
3f4ebf16459129150988b70745bebe025e3e2152cda00d378e2ed4840c03443c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x38E6 5132 bytes
font_01_sfnt_off00004a48.bin
3b1cbbc8788bca6ff5b80354f846d1a015d6d81dcc1985eb239f7d3a93465286		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A48 8716 bytes

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