Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8895cb4be6ce89e…

MALICIOUS

PDF

43.7 KB Created: 2020-08-25 11:53:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b5e100d8dc362643a03ee142cef71f8 SHA-1: 9cc230df2960361b598cb6b873fbb2e9dd0c40cf SHA-256: a8895cb4be6ce89e4423faa422a531dd90c8c04fb55542410fa9ad0e367b3bbe
120 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, pointing to 'https://ttraff.ru/pify?keyword=first+day+worksheets+3rd+grade'. This URL is likely used to redirect users to a malicious site. The document also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many pointing to Shopify domains, potentially to obscure the malicious intent. No scripts were extracted from this sample.

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=first+day+worksheets+3rd+grade
    • http://files.wildwoodsprings.org/uploads/1/3/0/8/130814195/ginalawef_ratijo_jixejono_moxefufufilug.pdf
    • https://cdn.shopify.com/s/files/1/0432/2387/5746/files/49688678710.pdf
    • https://cdn.shopify.com/s/files/1/0428/4638/8380/files/bses_online_payment_receipt.pdf
    • https://cdn.shopify.com/s/files/1/0428/2010/8455/files/interview_questions_for_b_tech_ece_freshers.pdf
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/mowijarotan.pdf
    • https://cdn.shopify.com/s/files/1/0439/0577/7832/files/alif_ba_ta.pdf
    • https://cdn.shopify.com/s/files/1/0432/7486/2758/files/68685704303.pdf
    • https://cdn.shopify.com/s/files/1/0431/0853/2380/files/5090718464.pdf
    • https://cdn.shopify.com/s/files/1/0463/5407/1709/files/biceps_muscle_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0434/1743/6312/files/nivopazumutovuzigamon.pdf
    • https://cdn.shopify.com/s/files/1/0435/9821/7378/files/antibioticos_tipos_y_clasificacion.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_off00005f62.bin
cf9605e07682d324f4abfa1537287e6c11fe52c3dadfb3c6fe0a7f6226d50501		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F62 5112 bytes
font_01_sfnt_off000070f4.bin
8a97a8a42dde66659803c12fb60bbaf5283e012672f974f1f87567304d8208ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70F4 10404 bytes
font_02_sfnt_off00009460.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9460 4324 bytes

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