Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1223e06d89fdab2…

MALICIOUS

PDF

46.5 KB Created: 2020-08-12 01:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67001011cceb327bf252f5a065d08a68 SHA-1: 6ab4923d9630bd21ca008d9f98c570a9d7962282 SHA-256: b1223e06d89fdab238296bc00adaefdfde05ee6c437a89522f72e9f96fb5ba2f
120 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, identified as a PDF link farm. One of these links, 'https://ttraff.cc/pify?keyword=agudas+palabras+pdf', is flagged as a malicious redirector. The document body contains garbled text and the tool information 'wkhtmltopdf 0.12.5', suggesting it was programmatically generated to host these links. The primary attack pattern involves directing users to potentially harmful external sites through this link farm.

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=agudas+palabras+pdf
    • http://xumize.tworiverscampgroundandstorage.com/uploads/1/3/1/0/131070476/8991165b2b8.pdf
    • http://files.thriftbox.org/uploads/1/3/2/7/132740337/wobejipedesifod.pdf
    • http://files.bauerinks.ca/uploads/1/3/2/6/132681836/cf6d02338c4eb1.pdf
    • https://cdn.shopify.com/s/files/1/0433/7264/2454/files/nutricion_enteral_y_parenteral_enfermeria.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/senabopupabavugaga.pdf
    • https://cdn.shopify.com/s/files/1/0433/0553/3598/files/57642725317.pdf
    • https://cdn.shopify.com/s/files/1/0427/4126/8647/files/javapolibetabaxixu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6737/4758/files/pemerejitazawevezikuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/6926/7354/files/tufexiwekexutab.pdf
    • https://cdn.shopify.com/s/files/1/0432/5238/3904/files/17381683050.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/96028465530.pdf
    • https://cdn.shopify.com/s/files/1/0428/7833/7187/files/61322601236.pdf
    • https://cdn.shopify.com/s/files/1/0433/5294/8901/files/iwaszkiewicz_brzezina_chomikuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/4367/6582/files/kawavim.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069c7.bin
d9f85d00914436589fb5c280d5f5bf9df4670f75ae7fb6c99326fc1d0bd0e044		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69C7 4756 bytes
font_01_sfnt_off000079f1.bin
d2c382e9038c465e19aff8a94c4a817a2bf3782ca9ae7664d3b1e0064af7a0d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79F1 11096 bytes
font_02_sfnt_off00009dfa.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DFA 4324 bytes

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