Malicious PDF — malware analysis report

Static analysis result for SHA-256 d419b229bd40a015…

MALICIOUS

PDF

47.6 KB Created: 2020-07-28 21:15:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acc2dc6cf9f7b67ee343b892afafaa50 SHA-1: c6bcbb5154ede0a41291fecb89bee9fcc126135d SHA-256: d419b229bd40a0159d26a7b3eb4c2c6f099056f2a38d3638c2cc2267e40acbc1
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a significant number of embedded links. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the ultimate destination of the attack. The document body, though heavily obfuscated, appears to be a lure related to a 'self certification form minnesota'. The presence of numerous external links, many hosted on Shopify, suggests a link farm or a method to distribute malicious content. No scripts were extracted from this sample.

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.cc/pify?keyword=self+certification+form+minnesota
    • http://files.bonnetcatering.com/uploads/1/3/0/7/130738914/4978455.pdf
    • http://files.getonboardnj.org/uploads/1/3/1/8/131856146/1488076.pdf
    • http://files.nancysniftynotes.com/uploads/1/3/1/3/131398253/9743245.pdf
    • https://cdn.shopify.com/s/files/1/0431/7465/8197/files/sikakawadotisedegokexilum.pdf
    • https://cdn.shopify.com/s/files/1/0430/6763/7917/files/pivole.pdf
    • https://cdn.shopify.com/s/files/1/0431/2698/0765/files/12051743197.pdf
    • https://cdn.shopify.com/s/files/1/0435/6256/5795/files/letizivuwaga.pdf
    • https://cdn.shopify.com/s/files/1/0437/6572/7384/files/84503047601.pdf
    • https://cdn.shopify.com/s/files/1/0434/3224/7457/files/masixivitizivuma.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3067/files/fisusezawopagupeperi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/95442396371.pdf
    • https://cdn.shopify.com/s/files/1/0430/3549/2503/files/4452885897.pdf
    • https://cdn.shopify.com/s/files/1/0432/6300/0734/files/33808837499.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e79.bin
ff54790eab90e14e6db73a8a742ab77b066108a74e0b5d30b8e496703f8b39c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E79 4916 bytes
font_01_sfnt_off00008efe.bin
ae3a84a3668e9926193c197c0d37aa714b7ee1eddb28f407777b2ced2b4f4bb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EFE 10016 bytes

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