Malicious PDF — malware analysis report

Static analysis result for SHA-256 d58c773524243743…

MALICIOUS

PDF

65.8 KB Created: 2020-08-19 20:22:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a678f80859132def6ff31f79f6f8e990 SHA-1: 9c96fc902ef5edb0aff070d762744cc7d8a0d67d SHA-256: d58c7735242437437e699df766baa90cebb54362f99fd754a00734c4af89983d
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. This URL is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains the same URL, reinforcing its malicious intent. The PDF also contains a large number of external links, a common tactic for SEO poisoning or link farming.

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.cc/pify?keyword=vmware++operations+manager
    • http://files.arizonaclay.net/uploads/1/3/1/4/131408581/7581708.pdf
    • http://gojux.advocatesfordiversity.org/uploads/1/3/1/6/131636725/334f3b21a464.pdf
    • http://relafub.saledomesticappliances.co.uk/uploads/1/3/1/3/131383483/3206434.pdf
    • http://zakusitit.brandyringer.com/uploads/1/3/2/8/132814930/jezuparuleni.pdf
    • http://files.boiseveteransdayparade.org/uploads/1/3/0/7/130776260/5079404.pdf
    • https://cdn.shopify.com/s/files/1/0433/6268/0984/files/35808325986.pdf
    • https://cdn.shopify.com/s/files/1/0448/2285/5837/files/72784481310.pdf
    • https://cdn.shopify.com/s/files/1/0428/0333/1231/files/92860700528.pdf
    • https://cdn.shopify.com/s/files/1/0433/0936/7461/files/70886558042.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1935/files/57753049660.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0486/files/fidujuxutiluxu.pdf
    • https://cdn.shopify.com/s/files/1/0436/1050/5379/files/bias_variance_decomposition.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8311/files/23984865118.pdf
    • https://cdn.shopify.com/s/files/1/0433/8489/7692/files/nilalumojamovog.pdf
    • https://cdn.shopify.com/s/files/1/0443/5417/5132/files/adestramento_ces_filhotes.pdf
    • https://cdn.shopify.com/s/files/1/0430/2913/5514/files/ledij.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_off0000bf90.bin
fce5fcea0c1e797ccaf60a2c3d8ef32d5442d2714ff84664e2167b0219d8de73		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF90 5164 bytes
font_01_sfnt_off0000d117.bin
523f7b138d983caec9695598fcfb2d2e6c5a4fef92f09e4b49f2b3df85c75de7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD117 12592 bytes

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