Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcce63f516b486d6…

MALICIOUS

PDF

39.8 KB Created: 2020-08-31 14:23:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 633da285c56dc1c5c9dfd922a168557a SHA-1: b2be56ecb32d972cba2805310aa0f6c03fe25ea6 SHA-256: dcce63f516b486d620eb51c70808b2c9f1f696479fd26e0f2e052141323b4c1c
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 the URL 'https://ttraff.com/pify?keyword=u+g+c+net+application+form', which is likely intended to lead the user to a phishing or malware download site. The presence of numerous other PDF links suggests a link farm intended to boost SEO or distribute 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=u+g+c+net+application+form
    • https://cdn.shopify.com/s/files/1/0428/3373/9932/files/98672484.pdf
    • https://cdn.shopify.com/s/files/1/0434/6888/2072/files/88300996582.pdf
    • https://cdn.shopify.com/s/files/1/0429/2149/2643/files/zemutepiforamole.pdf
    • https://cdn.shopify.com/s/files/1/0429/7159/4911/files/neleximorowunekudaxu.pdf
    • https://static.usrfiles.com/ugd/8d0191_237a344679874c1aa6576633896194f9.pdf
    • https://static.usrfiles.com/ugd/8b9728_5fde5f8628244fb8a35fa9eeecf6e607.pdf
    • https://static.usrfiles.com/ugd/5ed537_89059936784348b9ac6703cdad026c8e.pdf
    • https://static.usrfiles.com/ugd/9904c2_cf39269f0e064145a0c60e2fad78e083.pdf
    • https://cdn.shopify.com/s/files/1/0433/7539/4977/files/alien_shooter_apk_data_mod.pdf
    • https://cdn.shopify.com/s/files/1/0433/4842/6920/files/documenting_sources_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/1916/6105/files/kamozupotisu.pdf
    • https://static.usrfiles.com/ugd/3ceeb9_8468b8bc705645e4b6aae1f363b6c82c.pdf
    • https://static.usrfiles.com/ugd/3aca14_70cf37d1892043bebd9e898930578fa1.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_off00005e69.bin
100e74755ed8bb02af03fbc4312f1170f47b828b58bf39032103f2ac8626072b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E69 5148 bytes
font_01_sfnt_off00006fe2.bin
a5db6d6e78a350fa3b8af1b1fe4f2ebe65d558b98f6492004ed77f5fef53974a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE2 10416 bytes

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