Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c9957666e0d5a0c…

MALICIOUS

PDF

46.1 KB Created: 2020-08-21 10:06:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5843982cb29923f80ad7490b593682ab SHA-1: 453f0031b01ecd3eba0a70f6d61a514f418b4f2d SHA-256: 3c9957666e0d5a0c96d0c7801e20f3506c4b6b6b2976d2517a4b3be8aaf0e8c7
120 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to 'jury duty nsw exemption letter template' and the malicious URL. The primary malicious URL is ttraff.com, which is known to host redirectors. The document also contains numerous links to Shopify-hosted PDFs, likely part of a link farm to improve SEO for malicious content.

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.com/pify?keyword=jury+duty+nsw+exemption+letter+template
    • http://kerimid.enotecaathena.com/uploads/1/3/0/8/130813650/kitujokanag.pdf
    • http://dagapo.desertdew.net/uploads/1/3/1/6/131606027/ad18f6dde39.pdf
    • https://cdn.shopify.com/s/files/1/0428/1165/4307/files/8th_grade_math_final_exam_review_packet.pdf
    • https://cdn.shopify.com/s/files/1/0430/7491/2410/files/lesujafirasabotuga.pdf
    • https://cdn.shopify.com/s/files/1/0432/4275/0114/files/cetoacidosis_diabtica_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0429/8693/0329/files/45443465963.pdf
    • https://cdn.shopify.com/s/files/1/0436/6503/1321/files/wsu_general_scholarship_application.pdf
    • https://cdn.shopify.com/s/files/1/0435/2045/8906/files/vinotuxagefenosuga.pdf
    • https://cdn.shopify.com/s/files/1/0435/6187/7665/files/78021765765.pdf
    • https://cdn.shopify.com/s/files/1/0430/4162/0119/files/zudokikamuvegemumuzimu.pdf
    • https://cdn.shopify.com/s/files/1/0436/3314/8062/files/1519532421.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/72675710286.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_off00007473.bin
9c1e355d2d47046d5ebf5241273aab87b76d63d9eef81c263e1bd350bac624fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7473 5356 bytes
font_01_sfnt_off000086aa.bin
6fe889007e79ed040099054b959e6b2eac137758efea2e6686532119c019e1d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86AA 10860 bytes

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