Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1925024aa2fbacd…

MALICIOUS

PDF

50.0 KB Created: 2020-07-28 09:23:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8cb4a39d869c896fbc6202dc597f7005 SHA-1: 6ca5fc0d97aa1adfd00a786f8e1558efd239b3bb SHA-256: a1925024aa2fbacd8b34b60e2eab4a6f3217204550efb672d676890b7f35dc1e
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources, suggesting a link farm or redirection strategy. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=crowdsourcing+platform+wipro'. The document body, though heavily obfuscated, contains keywords related to 'crowdsourcing platform wipro', likely a lure. The presence of numerous PDF links, including one hosted on 'cdn.shopify.com', indicates a broad distribution attempt.

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=crowdsourcing+platform+wipro
    • http://files.kozal.net/uploads/1/3/0/8/130814208/lavus_pixogosodudixu_nusowero_xemolo.pdf
    • http://files.nlg-pros.com/uploads/1/3/0/9/130969910/katixiratowapo.pdf
    • http://files.afmxschool.com/uploads/1/3/1/6/131636834/2622799.pdf
    • http://files.lifegateindependentbaptist.com/uploads/1/3/2/6/132682235/177f1.pdf
    • http://files.carolinechurch.ca/uploads/1/3/0/8/130813037/dd376.pdf
    • https://cdn.shopify.com/s/files/1/0432/5274/4347/files/5544324487.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dubisetebezurazoxodo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2026/3322/files/lonav.pdf
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/tebisokebonotusirokake.pdf
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/dufigugi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1451/9966/files/tumelagaferuvujew.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89120683065.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/62138949062.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/82191842179.pdf
    • https://cdn.shopify.com/s/files/1/0432/2259/7800/files/maxemefebegisatujanudiwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6479/5046/files/24201586985.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ea9.bin
985d6384b33d1c750c190ee1eab11416423d4079163dfcf6dc5a555fcb8ae008		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA9 5352 bytes
font_01_sfnt_off000090d3.bin
85e05a98ac5d5d3eec6899ded6bb9a8e7c6060620c192e8869776891bcd44c12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90D3 12988 bytes

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