Malicious PDF — malware analysis report

Static analysis result for SHA-256 c89f94bcde40a532…

MALICIOUS

PDF

43.9 KB Created: 2020-08-22 15:24:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 870dcab9dc517a51af3170bab8ddcf59 SHA-1: 9ee83de6d910d5c1c7ad53c7bbf2045c95ddeebc SHA-256: c89f94bcde40a532b44eb14bd78b554a12ab3feed2332e5f008f7da0f8b54e42
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=adobe+animate+cc+free+trial'. This URL is presented within the document body, disguised as a link for a free trial of Adobe Animate CC. The PDF also exhibits characteristics of a link farm, suggesting a broader campaign to distribute malicious content. No scripts were extracted, and the document body is heavily obfuscated, but the primary malicious intent is clear from the redirector URL.

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=adobe+animate+cc+free+trial
    • http://files.safechildcoalition.net/uploads/1/3/0/9/130969305/5496288.pdf
    • http://tibarozug.multilanguagebox.com/uploads/1/3/2/6/132682663/1890954.pdf
    • http://files.brandgenius.com/uploads/1/3/1/4/131482886/puvevaw_mijoruruzenapi.pdf
    • https://cdn.shopif
    • https://cdn.shopify.com/s/files/1/0439/4372/3163/files/34864736827.pdf
    • https://cdn.shopify.com/s/files/1/0436/1538/7811/files/74946898305.pdf
    • https://cdn.shopify.com/s/files/1/0435/3084/6363/files/python_unit_test.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mekokagowofulagifofid.pdf
    • https://cdn.shopify.com/s/files/1/0430/6049/4485/files/javascript_functional_programming_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/2225/3205/files/ielts_discussion_questions_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0439/0086/2619/files/sizevapowan.pdf
    • https://cdn.shopify.com/s/files/1/0433/6674/4216/files/27022676264.pdf
    • https://cdn.shopify.com/s/files/1/0431/4464/2715/files/28116316113.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_off00006dd3.bin
834fab951ad160585969088048e99267498091e77f4e6809ceeb784b3504fbdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD3 5120 bytes
font_01_sfnt_off00007f26.bin
d105ee2185524b2b7e150f3ac3eb20791916dd6d9e2bc295db3c84fa16b761c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F26 10360 bytes

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