Malicious PDF — malware analysis report

Static analysis result for SHA-256 a46f5ff892f13bd2…

MALICIOUS

PDF

43.4 KB Created: 2020-08-15 22:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0057eb39144d60a110d2fc08792eabef SHA-1: f95260f76b26965c00b004d34923d8cd73cc0780 SHA-256: a46f5ff892f13bd246832cbe6f87bee5caa14273feddd485c58b34ce8a8f163a
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/wb?keyword=ricoh%20spc240dn%20manual'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to improve the ranking of the malicious redirector. 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.com/wb?keyword=ricoh%20spc240dn%20manual
    • http://files.learningspacesandlearningstyles.com/uploads/1/3/1/4/131483138/dc0d3903.pdf
    • http://files.jfransfarm.com/uploads/1/3/2/7/132710748/9410528.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/72495743641.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0750/files/39689630039.pdf
    • https://cdn.shopify.com/s/files/1/0436/5864/1573/files/reading_comprehension_worksheets_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/kirudonelikevuwureba.pdf
    • https://cdn.shopify.com/s/files/1/0439/2576/6312/files/52552941572.pdf
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/69685258507.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5080/files/a_thousand_pieces_of_you.pdf
    • https://cdn.shopify.com/s/files/1/0440/4012/6614/files/30494104170.pdf
    • https://cdn.shopify.com/s/files/1/0430/8933/0325/files/apa_outline_example.pdf
    • https://cdn.shopify.com/s/files/1/0437/4488/6936/files/encyclopaedia_of_islam_volume_3.pdf
    • https://cdn.shopify.com/s/files/1/0431/0928/6050/files/xipogasajigu.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_off00005e0b.bin
aed04eb80528fd51f39ed0d643621daae1413ae9613922ce4ced728f8087eebe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E0B 5584 bytes
font_01_sfnt_off000070e1.bin
8b83460d771143da9cb06ca79285ec156d61e75bda5dffd644acc4d8b6c746f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70E1 15876 bytes

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