Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f4d2904ebb1cda6…

MALICIOUS

PDF

76.1 KB Created: 2020-09-18 08:44:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af85e99e02a983a48dc1012b12fa4bd9 SHA-1: b3fe83db6da898f8231f345d0043ce691f2ed306 SHA-256: 9f4d2904ebb1cda6ae88a9cec3594e4fa39809f33d06456ce833b5fab51448ae
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.link/wix?keyword=weakauras+coding+guide'. This URL is presented within the document body, disguised as a 'Weakauras coding guide'. The PDF also contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or redirection strategy. The ML classifier also strongly flagged this PDF as malicious.

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.link/wix?keyword=weakauras+coding+guide
    • http://jufana.djspeaking.com/uploads/1/3/1/1/131164250/tisiv.pdf
    • http://vaforegis.travelingnurses1.com/uploads/1/3/1/6/131607110/e8ba22.pdf
    • http://files.cobh.coralleisure.ie/uploads/1/3/1/8/131871644/638db03f93b.pdf
    • https://cdn.shopify.com/s/files/1/0481/4097/6291/files/fedubulotupopulagopi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6428/5598/files/vodikagunugijexobafen.pdf
    • https://cdn.shopify.com/s/files/1/0443/1344/4508/files/gogezutuvanuzadonijav.pdf
    • https://cdn.shopify.com/s/files/1/0431/1243/1778/files/wemoko.pdf
    • https://cdn.shopify.com/s/files/1/0430/3906/4225/files/dukirur.pdf
    • https://cdn.shopify.com/s/files/1/0427/6345/2583/files/luwapave.pdf
    • https://cdn.shopify.com/s/files/1/0437/6798/8376/files/wajuxadebaxo.pdf
    • https://cdn.shopify.com/s/files/1/0451/3703/5429/files/27164786074.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3789128943.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_off0000e512.bin
5bebf6b2479b2b2de3c4dc6aea58eeac0e70e4741e55a7a0354ef0acaa0a7139		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE512 5152 bytes
font_01_sfnt_off0000f6bb.bin
67ea74025a7647635991b06f2e8058a54a1b128bc4fe1805516e7cbb7bcee335		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BB 14608 bytes

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