Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3e57dac3ceadc2f…

MALICIOUS

PDF

40.8 KB Created: 2020-10-31 19:49:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c938310793503bd7f6a9b0bd4a463e93 SHA-1: ee047b451f4c4c6cdfc9c3e3267f16f3eb98362d SHA-256: f3e57dac3ceadc2f9438114e7362d34d017e04e3d3344c72fd63ac5ac7817bff
94 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for linking to known malicious redirector infrastructure. The embedded URL, 'https://cctraff.ru/aws?keyword=train+from+boston+airport+to+fitchburg', is presented within the document body, masquerading as legitimate information. This suggests a phishing or redirection attempt to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://cctraff.ru/aws?keyword=train+from+boston+airport+to+fitchburg
    • https://neriborotarisim.weebly.com/uploads/1/3/4/3/134345051/534383be579d.pdf
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/jafowisada.pdf
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/kugozarovaso.pdf
    • https://lulitetuxopibol.weebly.com/uploads/1/3/1/1/131164377/banapugemet-mobex.pdf
    • https://xufitagetibo.weebly.com/uploads/1/3/4/4/134486135/bisumamadugigiba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0507/2751/8363/files/why_i_am_not_a_hindu_ambedkar.pdf
    • https://s3.amazonaws.com/mesixadelomomo/tarilojigomobogepes.pdf
    • https://s3.amazonaws.com/jumedemimo/83184266290.pdf
    • https://s3.amazonaws.com/kavitokolezub/aitsl_feedback.pdf
    • https://s3.amazonaws.com/janodojivi/amido_ceroso.pdf
    • https://cdn.shopify.com/s/files/1/0432/6791/5936/files/90701334572.pdf
    • https://s3.amazonaws.com/kizugokofo/daxobeled.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_off00005f07.bin
e34934981ffe0294d72f8fca762678b9c648df5a6c4757a64b2af1ac72b61ea9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F07 5488 bytes
font_01_sfnt_off00007184.bin
ecdb60ae47046882021470135f12bf77e581d033a106f0e4c26bc838d5a9c03f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7184 10872 bytes

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