Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8d75c365fecc127…

MALICIOUS

PDF

41.9 KB Created: 2020-08-17 12:58:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 164423c03e8551051bea209b2b63b379 SHA-1: 7ed8e4e20c518f437ac645abad9dfbc52cd3dbf8 SHA-256: b8d75c365fecc12781ead7f6e6c27e5eee50cbc7f25c20b5b132bcff48c334d9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF document contains multiple embedded links, with one specifically identified as a malicious redirector. The document body text, though partially corrupted, contains the URL 'https://ttraff.cc/pify?keyword=calendar+2020+psd+free', which is flagged as malicious. The presence of a 'remote-support tool lure' heuristic suggests the document aims to trick the user into installing or running potentially harmful software. The PDF also functions as a link farm, directing users to numerous other PDF files, likely for SEO manipulation or to host further malicious content.

Heuristics 4

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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.cc/pify?keyword=calendar+2020+psd+free
    • http://jipevom.hcesaladmaster.com/uploads/1/3/0/9/130969634/4957743.pdf
    • http://vusurir.bcbu.us/uploads/1/3/0/7/130776644/4787884.pdf
    • https://cdn.shopify.com/s/files/1/0429/2512/9891/files/niwamarevomeluduxe.pdf
    • https://cdn.shopify.com/s/files/1/0434/3808/0167/files/walter_scott_books_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/3626/9983/files/25562282548.pdf
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/5966306185.pdf
    • https://cdn.shopify.com/s/files/1/0432/4111/1707/files/wafamovexegojirekuri.pdf
    • https://cdn.shopify.com/s/files/1/0438/5318/5174/files/wavanex.pdf
    • https://cdn.shopify.com/s/files/1/0446/6976/3747/files/bluford_series_the_bully.pdf
    • https://cdn.shopify.com/s/files/1/0433/3427/1126/files/litogizadibag.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7284/files/angularjs_interview_questions_and_answers_for_experienced.pdf
    • https://cdn.shopify.com/s/files/1/0428/8934/7228/files/basic_english_conversation_questions_and_answers.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_off00005e21.bin
ce4f1c0d8265a78eeedc6b444d438c66c5494ebab28085cbb3af4574ad8dfd66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E21 5216 bytes
font_01_sfnt_off00006fe5.bin
5980d843aa3e304b545c684a178dbf3edd593526471eeaffe5ddf6e5aeb9b6e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE5 14028 bytes

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