Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1ce0439a5165e20…

MALICIOUS

PDF

42.8 KB Created: 2020-08-19 14:20:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 503b50a061b097f775f8ad064f2fb598 SHA-1: 183734bfd294290240a2e08f12f930c4d90c43b2 SHA-256: f1ce0439a5165e20081ae63880eb279a41d272a04d4d7d5df38840c510a91fa7
120 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The document body text and embedded URLs suggest a lure related to "accident report sample writing" which directs to a malicious URL. The primary malicious IOC is the redirector URL, which is likely used to host or deliver further malicious content.

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=accident+report+sample+writing
    • http://files.matrixbathfittings.com/uploads/1/3/2/7/132740435/mepebigudiverimi.pdf
    • http://files.reikifortheplanet.com/uploads/1/3/2/3/132302815/5645773.pdf
    • https://cdn.shopify.com/s/files/1/0438/4253/5581/files/numosolobubapixagor.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/81192394908.pdf
    • https://cdn.shopify.com/s/files/1/0429/5848/7715/files/reasoning_and_computer_aptitude_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/8446/3784/files/39088215025.pdf
    • https://cdn.shopify.com/s/files/1/0432/8488/9758/files/qualitative_test_carbohydrates.pdf
    • https://cdn.shopify.com/s/files/1/0437/1084/1000/files/rukifowatetogonilusokewe.pdf
    • https://cdn.shopify.com/s/files/1/0434/8307/0630/files/wopewopowuban.pdf
    • https://cdn.shopify.com/s/files/1/0437/8309/4434/files/73920388981.pdf
    • https://cdn.shopify.com/s/files/1/0430/8461/1737/files/tonijavaxupababunuwoliv.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_off000069b8.bin
e9bf3044cda380809d0f2d1f011779e85d0d77df92a336bc372014ae8ec79064		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69B8 5476 bytes
font_01_sfnt_off00007c3e.bin
8868ba7e46e137a81ad23040de1cb0cbc9f13de07bf6c66eaaeee8392d804f14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C3E 10084 bytes

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