Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7d6e6449e21ae6e…

MALICIOUS

PDF

52.7 KB Created: 2020-08-09 06:59:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c08d725b2d21116833445e38f07acccf SHA-1: de3ed6369ab84e077d84c8f092ddcd9334f2e793 SHA-256: a7d6e6449e21ae6ee520fc09e740a384a182cac1326d354a3cf1ab65e44e8819
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This indicates the document's primary purpose is to redirect users to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated.

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.
  • 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.
  • 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.com/wb?keyword=art%20of%20flaneur%20pdf
    • http://pomigo.householdarchaeology.org/uploads/1/3/0/7/130739777/puzaraxu_sevorij_baxibuxud_xezevekevox.pdf
    • http://files.275athletics.org/uploads/1/3/1/4/131437680/ritup_kudejatonipo_xavoguxosagop.pdf
    • http://files.champsinhaiti.org/uploads/1/3/1/4/131408280/mozexoguji-gegelugavenire-xikik.pdf
    • https://cdn.shopify.com/s/files/1/0433/6120/6422/files/49140370149.pdf
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/kizulerakuxan.pdf
    • https://cdn.shopify.com/s/files/1/0431/9857/8848/files/wigawibiwibudajogem.pdf
    • https://cdn.shopify.com/s/files/1/0431/5004/9448/files/pogipuratexisinomata.pdf
    • https://cdn.shopify.com/s/files/1/0427/5693/1751/files/zawifinogefe.pdf
    • https://cdn.shopify.com/s/files/1/0440/7764/5989/files/wujiko.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52733892229.pdf
    • https://cdn.shopify.com/s/files/1/0436/4884/3934/files/romanebetuba.pdf
    • https://cdn.shopify.com/s/files/1/0436/1961/4882/files/witurutofudetaluviwi.pdf
    • https://cdn.shopify.com/s/files/1/0438/4853/2128/files/xesajelupowureze.pdf
    • https://cdn.shopify.com/s/files/1/0430/8434/9591/files/36391473200.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/
    • https://cdn.shopify.com/s/files/1/04

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000918d.bin
9cde1671844829822c39d87c786990ad18bfce74c9856cd64053004d5683898f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x918D 4848 bytes
font_01_sfnt_off0000a21a.bin
131cba9ab06bf0db476059b6a5b1b80ca4456d09dc88a071b100e5dd53c3aef9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA21A 10588 bytes

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