Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb781fc03442732a…

MALICIOUS

PDF

44.9 KB Created: 2020-07-27 05:09:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2578412022e42d81ce9216c36a49bde SHA-1: 5ac4f7fe621fa447b973dbd572fbe43b0e3d785c SHA-256: cb781fc03442732ac607348401ad81847195ce3d6e2f47da9a0ddde31af6199c
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used to obscure malicious destinations and engage in SEO poisoning. One critical heuristic identifies a link to a known malicious redirector, ttraff.ru, which is disguised as a free jigsaw puzzle template. This suggests the primary goal is to redirect users to malicious infrastructure, likely for further exploitation or credential harvesting.

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=jigsaw+puzzle+ppt+template+free
    • http://files.veteransfurniturecenter.org/uploads/1/3/1/3/131383771/busul.pdf
    • http://files.atlantikwall-museum.nl/uploads/1/3/1/8/131856072/3503593.pdf
    • http://files.othellogrowsupplyllc.com/uploads/1/3/1/6/131636914/vugaguwareleno.pdf
    • https://cdn.shopify.com/s/files/1/0432/7748/4196/files/28316181878.pdf
    • https://cdn.shopify.com/s/files/1/0429/4026/8711/files/91909119536.pdf
    • https://cdn.shopify.com/s/files/1/0428/0582/1599/files/sozefudim.pdf
    • https://cdn.shopify.com/s/files/1/0433/3492/6495/files/firoxuvamapikaw.pdf
    • https://cdn.shopify.com/s/files/1/0440/2449/6286/files/79688514312.pdf
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/depome.pdf
    • https://cdn.shopify.com/s/files/1/0431/1482/3844/files/31768480563.pdf
    • https://cdn.shopify.com/s/files/1/0429/5678/3772/files/43558875592.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7500/files/54233346175.pdf
    • https://cdn.shopify.com/s/files/1/0431/0925/3282/files/dipixasazejopev.pdf
    • https://cdn.shopify.com/s/files/1/0428/4655/2227/files/33465675432.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_off000072f1.bin
e5f69e993328c83c2f2d89f9d173476335bdbc25a9db859d69347ce51ff8984f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F1 5016 bytes
font_01_sfnt_off00008423.bin
dbb6d67f88777d7fa947297cd12953a21082d34ec705d683e1bdb53a3eaca799		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8423 10112 bytes

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