Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d1f5015a1fcbee5…

MALICIOUS

PDF

39.4 KB Created: 2020-08-23 16:15:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2f74d2cb10372a8ff8810b4afadbd45 SHA-1: a4addd57e765bb6bd451d0d85631fa1392450a03 SHA-256: 2d1f5015a1fcbee5e9a04600a6fdaf3439b4394f374924cdae7191230c4aee43
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body contains obfuscated text and a URL that appears to be part of a link farm, likely intended to drive traffic to the malicious redirector.

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.ru/pify?keyword=guidewire+software+inc
    • http://files.lizteoli.com/uploads/1/3/0/7/130739480/49b6a70c1b778e.pdf
    • http://keroduru.americanawningabc.com/uploads/1/3/2/7/132712207/55c92.pdf
    • https://cdn.shopify.com/s/files/1/0438/0740/8290/files/81065108123.pdf
    • https://cdn.shopify.com/s/files/1/0464/3124/0344/files/sql_stuff_for_xml_path_performance.pdf
    • https://cdn.shopify.com/s/files/1/0430/5115/5618/files/xaligimujenijeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/7601/7559/files/is_rstudio_better_than_r.pdf
    • https://cdn.shopify.com/s/files/1/0438/6534/2117/files/tedoguwapegi.pdf
    • https://cdn.shopify.com/s/files/1/0436/1833/6925/files/23147689947.pdf
    • https://cdn.shopify.com/s/files/1/0434/3005/2005/files/anne_carson_poems.pdf
    • https://cdn.shopify.com/s/files/1/0437/2188/3816/files/bangla_golpo_boi_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/5185/9616/files/lufojuvewutuvugadevoroko.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17232613021.pdf
    • https://cdn.shopify.com/s/files/1/0433/4937/7177/files/jisikofumuramiditifikad.pdf
    • https://cdn.shopify.com/s/files/1/0431/8131/0101/files/sqlite_database_free_for_mac.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_off00005bfc.bin
8c5e6f2b228fa3f87b6ecae0dc2122f7bab51020d3c0c6dd1673f7c23c3ad5e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BFC 5104 bytes
font_01_sfnt_off00006d77.bin
35a623af647bc929731520dced3aad9dec4781e046cc10ddf2962a267f2e9e7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D77 10420 bytes

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