Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a100751b5c117a6…

MALICIOUS

PDF

71.7 KB Created: 2020-08-23 02:21:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 414b8c920e60995c5aa5ad08673f2e95 SHA-1: 417e7ca97536458913a3719ec61e4e202d067d8a SHA-256: 2a100751b5c117a64418f8c1175cf1d3c0d96d5fd179523262c269f928dfde36
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=catechist+formation+workbook'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains the text 'Catechist formation workbook', suggesting a lure. The primary attack pattern involves redirecting the user to malicious infrastructure.

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=catechist+formation+workbook
    • http://sisem.jimmydebutts.com/uploads/1/3/1/8/131856161/ziwawejebew-sidofutam.pdf
    • http://files.safepassagesandprose.com/uploads/1/3/1/4/131437711/bab16d9ef.pdf
    • https://cdn.shopify.com/s/files/1/0432/3606/5438/files/42230633223.pdf
    • https://cdn.shopify.com/s/files/1/0437/9072/9377/files/estudio_descriptivo_ejemplo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6375/4404/files/31961559263.pdf
    • https://cdn.shopify.com/s/files/1/0434/7055/3238/files/joint_stock_company_notes.pdf
    • https://cdn.shopify.com/s/files/1/0433/7873/7302/files/rastafarian_history_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0436/4442/0246/files/run_android_apps_on_mac_2019.pdf
    • https://cdn.shopify.com/s/files/1/0440/8049/6792/files/razavolapenavupim.pdf
    • https://cdn.shopify.com/s/files/1/0440/1653/3654/files/tumuxepisemututunemimife.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_off0000dc76.bin
cc4ee893fe2b09dbec79510bde3e74db5a7acf8537e37fdd8616142c66afadd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC76 5288 bytes
font_01_sfnt_off0000ee60.bin
1197711e3b8a8ae971db0816d4b3fc9951fc8e48ad1885185e0308685b7b2c27		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE60 10524 bytes

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