Malicious PDF — malware analysis report

Static analysis result for SHA-256 f336ed478b0aa1c1…

MALICIOUS

PDF

55.3 KB Created: 2020-08-28 08:00:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a352d009422e20682ddef86111498e9 SHA-1: 1cff638e2a8df65cd840beedf52acffe87e1d6ce SHA-256: f336ed478b0aa1c1e5677e22c9e2a02c1a10a09061d9e9bae9f34253aefad3f8
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link farm pointing to a malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=hay+bin+yakzan+%25C3%25B6zet. The document body is heavily obfuscated and appears to be largely junk data, but it does contain the malicious URL. The presence of a link farm suggests an attempt to distribute malicious content or phishing pages.

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=hay+bin+yakzan+%25C3%25B6zet
    • http://jedujo.clinmicrolab.org/uploads/1/3/2/3/132303382/46e6c.pdf
    • http://files.stamfordstrings.co.uk/uploads/1/3/2/7/132740606/1655683.pdf
    • http://remavevan.en.skandiaorgeln.com/uploads/1/3/1/4/131438304/besasuso.pdf
    • https://cdn.shopify.com/s/files/1/0427/9359/9132/files/73573003785.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/84901106239.pdf
    • https://cdn.shopify.com/s/files/1/0438/3745/6534/files/12914427325.pdf
    • https://cdn.shopify.com/s/files/1/0435/0047/0438/files/3593424601.pdf
    • https://cdn.shopify.com/s/files/1/0437/4944/1687/files/frca_short_answer_questions.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tikifulodu.pdf
    • https://cdn.shopify.com/s/files/1/0459/9237/8527/files/terod.pdf
    • https://cdn.shopify.com/s/files/1/0432/9200/0412/files/acheron_sherrilyn_kenyon_ita.pdf
    • https://cdn.shopify.com/s/files/1/0444/2878/7878/files/unity_lookat_2d.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_off0000993f.bin
e9b6d6436b6e0f998fc910c0e26af354c16ef5cdd1b00e69ed9c74e660b850f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x993F 4828 bytes
font_01_sfnt_off0000a992.bin
f20f3f58821bea36bedf09aa214c460f0fda6bd8732744fcf4c43b6c64d8eec7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA992 12008 bytes

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