Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe13b1edf88fb704…

MALICIOUS

PDF

40.7 KB Created: 2020-08-18 12:57:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a50a6ef6b3cf9ab43886f86024c9cdc SHA-1: f95fcd0451cee4e1f4522129d01dc825997892eb SHA-256: fe13b1edf88fb7044b1cdc2912be43ba3cb53e3cd2ea7f0af18a79a02e645bd9
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to PDF files hosted on Shopify. One of these links, 'https://ttraff.com/pify?keyword=alquiler+de+ahoyadores+manuales', is identified as a malicious redirector. This suggests a link farm or redirection attack designed to lead users to malicious content. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=alquiler+de+ahoyadores+manuales
    • http://dogoril.ottesonpsych.com/uploads/1/3/0/9/130969352/6425065.pdf
    • http://files.mudrayogadf.com/uploads/1/3/1/8/131856852/2356529.pdf
    • https://cdn.shopify.com/s/files/1/0430/4365/1735/files/regadogepowunu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2175/3758/files/35840167437.pdf
    • https://cdn.shopify.com/s/files/1/0431/8396/4324/files/penabebifibiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38746106010.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8381/files/jeximumudaweletigotomef.pdf
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/92109595576.pdf
    • https://cdn.shopify.com/s/files/1/0431/9330/3204/files/19894600272.pdf
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/92738120539.pdf
    • https://cdn.shopify.com/s/files/1/0428/6034/7551/files/career_path_finder_after_12th.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_off00005c58.bin
3ee7046b38239e6e2afb9010cba43e4b13f6575a5af6902857723c6de8a392aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C58 5280 bytes
font_01_sfnt_off00006e21.bin
da2c08c4a1baad8d26dcfa74a1f779904a248b38ec7820178cff6b4dc11019d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E21 11900 bytes

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