Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cae7a00b1851c08…

MALICIOUS

PDF

67.0 KB Created: 2020-07-08 23:28:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a42f8d3e93d8d9f7302d0223a9f0c45c SHA-1: 3e75b725d755343960e4129f6b6ab028a92c5c9b SHA-256: 0cae7a00b1851c080c7eebbe349f36610feed73f18067bd80126aeeb31b5c28d
154 Risk Score

Malware Insights

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

This PDF file contains a large number of links to external PDF files, masquerading as search results for a 'Walther p22 owners manual pdf'. One of the embedded URLs, 'https://ttraff.cc/wb?keyword=walther%20p22%20owners%20manual%20pdf', is identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves directing users to potentially harmful websites.

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.cc/wb?keyword=walther%20p22%20owners%20manual%20pdf
    • http://files.hillclimbacupuncture.com/uploads/1/3/1/4/131453560/3678322.pdf
    • http://files.nejnamc.org/uploads/1/3/1/6/131607346/bujowadatasivo.pdf
    • http://files.designsbycarolann.com/uploads/1/3/0/8/130814513/ac27058e6e8.pdf
    • http://files.kimkirch.com/uploads/1/3/0/7/130775827/welobozutudirol-fulunim.pdf
    • http://files.lockmangenetics.com/uploads/1/3/0/7/130775383/nizejab.pdf
    • http://files.whsrobowarriors.com/uploads/1/3/1/8/131858975/6578fd.pdf
    • http://files.opunakesurflifesaving.com/uploads/1/3/0/8/130814513/gezitowejukejekojuko.pdf
    • http://files.tiffanyharrisonhome.com/uploads/1/3/1/3/131383977/8603988.pdf
    • http://files.morethansoulfood.net/uploads/1/3/2/3/132302973/timuf.pdf
    • http://files.skyleblanc.com/uploads/1/3/1/6/131637034/sabosutukitikusuwiw.pdf
    • http://files.shazkya.com/uploads/1/3/2/6/132696285/jajanaf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://wedululugun93388303.files.wordpress.com/2020/07/vovetevuma.pdf
    • https://vutokavajino.files.wordpress.com/2020/06/89249380654.pdf
    • https://famunuguraj492377956.files.wordpress.com/2020/06/34287980710.pdf
    • https://temapozu.files.wordpress.com/2020/07/vokod.pdf
    • https://nojurofezep809160310.files.wordpress.com/2020/07/78827415421.pdf
    • https://xokumawuv.files.wordpress.com/2020/07/luwus.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/norojakibi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vaxopegi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doxufuvezemog.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekosipavejidowusa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71061356311.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_off0000b98d.bin
902fcfd7decfc9128f6bd9323653480708ee8868e87c4cc8a28df945aa098dad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB98D 5352 bytes
font_01_sfnt_off0000cba5.bin
93ad8c90e30faa6f01a9ce898e034f0ce62ab806423cc0d031914f3fb87046a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA5 15936 bytes

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