Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1d20ab53cf3d20e…

MALICIOUS

PDF

42.7 KB Created: 2020-08-31 15:38:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c46ddb3d4bae02d454a8307fe5e395db SHA-1: 1390e738bb5ce10c9b1e0d26efc7dfc0d5d366e0 SHA-256: f1d20ab53cf3d20eefd4a630c991c65ba4ca8f8a37af83318441da1468c67feb
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL, 'https://ttraff.cc/pify?keyword=associate+android+developer+certification+training', is designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, also contains this URL and other Shopify links, suggesting a link farm or redirection strategy. The ML classifier strongly supports the malicious nature of this PDF.

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=associate+android+developer+certification+training
    • https://cdn.shopify.com/s/files/1/0439/1544/4376/files/kofasodowo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5064/7204/files/23205439594.pdf
    • https://cdn.shopify.com/s/files/1/0434/8762/5369/files/analogias_de_figuras_ejercicios.pdf
    • https://cdn.shopify.com/s/files/1/0450/7284/2915/files/gobumizijodexobajeram.pdf
    • https://cdn.shopify.com/s/files/1/0454/4040/1566/files/sullivan_college_algebra_and_trigonometry_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/3006/8894/files/cpr_aha_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0428/9160/8227/files/91207782135.pdf
    • https://cdn.shopify.com/s/files/1/0433/8214/5182/files/50463885474.pdf
    • https://static.usrfiles.com/ugd/f0e51d_b094a8ae882c48bfaaa7430671ab779d.pdf
    • https://static.usrfiles.com/ugd/77eba6_76f86a84284841c8b0d4752616fbdc7e.pdf
    • https://static.usrfiles.com/ugd/b8c837_790dd339d1a04b8fb4af639928740fc0.pdf
    • https://static.usrfiles.com/ugd/b8c837_83b5581846904130aa0d4c35885f5f10.pdf
    • https://static.usrfiles.com/ugd/aff7ca_a6569f7be59f43379febc440ac7acd52.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/1/0454/4040/1566/f

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067f1.bin
c3dcbb4d092670ce7ee0e7598c135345d7b34b0ac0433dce74e4af35baaa9aa0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67F1 5372 bytes
font_01_sfnt_off00007a52.bin
113a0dc14b89a9e9af4ef960a6ffc6017da8c51aa0a31b6dca3e9651c9bbe8c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A52 10364 bytes

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