Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e1d4bd6446dd609…

MALICIOUS

PDF

42.7 KB Created: 2020-08-01 11:26:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a20dc5e4ecfe2b29fe0f4b728e3ea5bb SHA-1: 554b3e55fbe7df9defe0e03f6815a8ac4200ff6e SHA-256: 4e1d4bd6446dd6092fafb72543ce125ca4318bf4e27fcda4d01b8aef36b62696
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=windows+xp+activator+tool'. This URL is presented within the document body, suggesting a lure to trick users into downloading or executing malware. The PDF also contains a large number of external links, indicative of a link farm, further supporting the malicious intent.

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=windows+xp+activator+tool
    • http://files.stephenhallmarimba.com/uploads/1/3/1/1/131163533/jufoga-jizul.pdf
    • http://files.visualbiochemistry.com/uploads/1/3/0/9/130969310/4628827.pdf
    • http://files.timhamelprofessionalmassage.com/uploads/1/3/2/6/132695339/3691477.pdf
    • http://files.battleagainsthunger.org/uploads/1/3/1/0/131070827/2ebfafbdf45dfbe.pdf
    • http://files.drdom.com.au/uploads/1/3/1/1/131164310/xoxun.pdf
    • https://cdn.shopify.com/s/files/1/0429/2853/7753/files/venag.pdf
    • https://cdn.shopify.com/s/files/1/0432/8908/4068/files/59611214947.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/befuxaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/6105/9482/files/90508987216.pdf
    • https://cdn.shopify.com/s/files/1/0430/9280/3744/files/wikanalufetajaxuve.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78683638278.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9444/files/57216600331.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/renemuriloke.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9009713252.pdf
    • https://cdn.shopify.com/s/files/1/0434/4876/2529/files/bdf_rwanda_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0432/0310/0836/files/50059059683.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_off0000689c.bin
4efbb39c99ca730719ab7c2aadbfc9f5a0164f267f05e4b65046c5c20d50dff7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x689C 5300 bytes
font_01_sfnt_off00007ad0.bin
fe3ffb7705c8154bcd94f690d2180dc57badad238ee2ff209e3567d73437b523		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD0 10280 bytes

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