Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8b00bda6c110493…

MALICIOUS

PDF

42.3 KB Created: 2020-08-17 11:33:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a56db4cdef76114fa95596230e35e955 SHA-1: 22db69d776466e9c0e1a1e5d1db48edcd0724ffd SHA-256: e8b00bda6c1104935f3435aefbabd69feb244e4f1fe426f3fb7d8fd32ea7d6d6
150 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 pointing to 'https://ttraff.ru/pify?keyword=guitar+sheet+music+free+country'. It also contains a PDF link farm heuristic, indicating it's part of a larger SEO manipulation effort. The document body, though heavily obfuscated, contains the same redirect URL, reinforcing the lure. The primary attack pattern involves tricking users into clicking this link, likely leading to a malicious download or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=guitar+sheet+music+free+country
    • http://files.saltwatercowboyfishing.com/uploads/1/3/2/7/132740533/14f09f71f.pdf
    • http://files.celebrateyourstories.com/uploads/1/3/1/3/131380126/9097468a033e67e.pdf
    • https://cdn.shopify.com/s/files/1/0433/5271/9515/files/23836539392.pdf
    • https://cdn.shopify.com/s/files/1/0431/3874/4469/files/vuvurumali.pdf
    • https://cdn.shopify.com/s/files/1/0433/2398/1979/files/dijekafezi.pdf
    • https://cdn.shopify.com/s/files/1/0449/7843/8302/files/vrealize_automation_7_installation_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/rasixamexewiwudulivazipus.pdf
    • https://cdn.shopify.com/s/files/1/0430/5833/1799/files/53087737521.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/watchguard_software_downloads.pdf
    • https://cdn.shopify.com/s/files/1/0431/2812/7637/files/99059980649.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/
    • https://cdn.shopify.com/s/files/1/0449/7843/8302/files/vrealize_au

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006159.bin
366018fc83ce37e3a01348cf7ec3771c77884c149955e9f258ba43f2aae3a0f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6159 5224 bytes
font_01_sfnt_off00007306.bin
81695c986504e448ddfcc05ac642fb8e8b11a3ed40868a52d19ab589cf402482		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7306 13148 bytes

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