Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c30989ed726001a…

MALICIOUS

PDF

36.9 KB Created: 2020-09-09 22:52:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 016d3980651c7b80ad1e6ddd95551354 SHA-1: 3d33fb5a6b84bc24ed66f2b69369dbc6cec8e6c5 SHA-256: 0c30989ed726001a211a60b7b2aa5b52bec3b3634fce2497e101063e77c46d26
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.ru/pify?keyword=test+speed+wifi+apk', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other benign-looking PDF links, suggesting a link farm or phishing attempt. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=test+speed+wifi+apk
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7720/6178/files/bal_ganesh_2_dj_songs.pdf
    • https://cdn.shopify.com/s/files/1/0428/4717/4822/files/organizational_chart_for_school_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/2741/4696/files/keparuri.pdf
    • https://static.usrfiles.com/ugd/fc3b0b_7823ec9db383466fbe7287b1ee3c5be2.pdf
    • https://static.usrfiles.com/ugd/55cc32_c8ca1e1b333b4712b8407f51fc2eb973.pdf
    • https://static.usrfiles.com/ugd/974a4e_0ead55419e3d4087a7015cd1edfc0461.pdf
    • https://static.usrfiles.com/ugd/d902bb_028bc5d7091041408b01c1721cde2f5e.pdf
    • https://static.usrfiles.com/ugd/61f964_98f56f064e5a414eb4abb7b4b18a13a3.pdf
    • https://static.usrfiles.com/ugd/89441e_5168048a118c402aa6595591c4b55021.pdf
    • https://static.usrfiles.com/ugd/516574_42ddd37a3fbf41bda520de7bb03a1b27.pdf
    • https://static.usrfiles.com/ugd/a891c0_2a4c6c03dd0747b8b483fd540f6116af.pdf
    • https://static.usrfiles.com/ugd/b8c837_9c95a08287494a98a421dfaa26c82ccf.pdf
    • https://static.usrfiles.com/ugd/7f16bd_86b2c6f3eaf144f68a15322aa6f41516.pdf
    • https://static.usrfiles.com/ugd/e32576_9ca3736411544105a9b981222b6d079d.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004866.bin
692c72bee6d6d4eed94dd510ef696c9bcc6329a117d305cb2e090b1f7b00b3ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4866 5012 bytes
font_01_sfnt_off0000599a.bin
fa98316bad0ee393e4244be63b1d230beb4724cf855be96ad4f2c87a5b302ae2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x599A 2140 bytes
font_02_sfnt_off00006374.bin
f25d7c61eec00d47836dfacf00057b689fc313e2401fcab798051d7a297bb8ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6374 10316 bytes

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