Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6bd00765b1a3b71…

MALICIOUS

PDF

41.9 KB Created: 2020-08-30 16:03:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8975fc7d10f3f28ce08d3f806734880b SHA-1: f79208d3d9c0d09f940bd94d10446736ade378bb SHA-256: a6bd00765b1a3b7181411e07eacfdcec5b6a369fb79fdbe56995aa91f11d207d
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.ru/wix?keyword=determinacion+de+grupo+sanguineo+prueba+inversa+pdf'. This indicates an attempt to redirect the user to a malicious site. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The file is likely a lure to a phishing or malware distribution site.

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/wix?keyword=determinacion+de+grupo+sanguineo+prueba+inversa+pdf
    • https://cdn.shopify.com/s/files/1/0431/0564/8801/files/88000554362.pdf
    • https://cdn.shopify.com/s/files/1/0434/3549/1490/files/12749275437.pdf
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/80667755359.pdf
    • https://cdn.shopify.com/s/files/1/0431/8137/5648/files/2192196196.pdf
    • https://cdn.shopify.com/s/files/1/0427/6640/1692/files/aws_certification_solution_architect.pdf
    • https://cdn.shopify.com/s/files/1/0439/9664/3486/files/sestina_poem_questions_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/refusazujavimagiwate.pdf
    • https://cdn.shopify.com/s/files/1/0438/4591/0678/files/dha_bahawalpur_challan_form_2020.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f6068acbefa42d9a9039bad35eae4bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_a292157288c34cb6a8fde7ba316f5abb.pdf
    • https://static.usrfiles.com/ugd/e745be_5a923a4653c0461388a52c817c2a8941.pdf
    • https://static.usrfiles.com/ugd/d5cf39_c2d3b6a54cbd4f1f8cf089ae712f220b.pdf
    • https://static.usrfiles.com/ugd/b8c837_7a9900ea248a4ee1b9f7bee44bbebd19.pdf
    • https://static.usrfiles.com/ugd/6f58fb_386fba8426b3404d9cc9a5bb470695ae.pdf
    • https://static.usrfiles.com/ugd/b8c837_92488ebecacd42a48bb8969f0ff89d03.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_off0000606f.bin
d39ab1a611aa5ae88d9a470060b0eff9793fc47d54932abf0bdb3f29e0884f3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x606F 5640 bytes
font_01_sfnt_off00007382.bin
45eea6b1985d96dc9e2594227d1463990ab4f3b4b58de24ca8de460ba9764f19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7382 11476 bytes

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