Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1971091f765e99a…

MALICIOUS

PDF

60.5 KB Created: 2020-08-30 12:48:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df7df572bce7af6dd341d3f343ef5c33 SHA-1: 214dbd7beb9f1be3a0b319ba52c36a8941fb2b9d SHA-256: e1971091f765e99a286a315e3accbc9245dadd7bc260f187eba9b784fb95765a
94 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, ttraff.ru, which is flagged for distributing malware. The document body and embedded link text suggest a lure for a game mod, likely to trick users into downloading a malicious payload. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/wix?keyword=modern+combat+4+mod+apk+1.2.2e
    • https://static.usrfiles.com/ugd/cf14a4_1abac909759c4894badd9d59790fdebd.pdf
    • https://static.usrfiles.com/ugd/b8c837_449531be947f4abbbab4ac6ba5463b66.pdf
    • https://static.usrfiles.com/ugd/b8c837_7749e4e019894db19f760c4fb37cd163.pdf
    • https://static.usrfiles.com/ugd/87fdc7_6f6899e3045b484c8b16778251f6fa97.pdf
    • https://cdn.shopify.com/s/files/1/0468/1518/3002/files/35360026661.pdf
    • https://cdn.shopify.com/s/files/1/0437/4344/5141/files/rirejonep.pdf
    • https://cdn.shopify.com/s/files/1/0439/2045/7883/files/my_name_is_yoon.pdf
    • https://cdn.shopify.com/s/files/1/0434/6498/2693/files/pazejefudogilaxulejibiwe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000b2cc.bin
4671cdfb29295ea7aa61b857020a0f60932520bb9513c9cd7654e189c653a3fe		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB2CC 28572 bytes
font_00_sfnt_off000071e6.bin
f5a1aa548e1ec3018567eaaf27b8a081d429ea339e708b1a41527d449c3ab730		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71E6 5524 bytes
font_01_sfnt_off000084aa.bin
80125f9f2a594e780940cd4dfbed04af7b57a3d5f01d00ec4dfe3d32ccd8293a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84AA 14644 bytes

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