Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7f0358af9afd733…

MALICIOUS

PDF

34.1 KB Created: 2020-08-31 05:57:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b63ee1918dc6677bc5b8d04735d5ea09 SHA-1: c38ce6dee00551d0f8e956d0c51e4a67332fcfb8 SHA-256: f7f0358af9afd733f6dc2c178345c251d32a3756a169feb0d1ec959fffc54ff7
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains the same URL and a title that appears to be a lure for free content. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing confirms the malicious nature of the embedded URL.

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/wix?keyword=kehte+hain+khuda+ne+female+version+ringtone+free+download
    • https://static.usrfiles.com/ugd/b8c837_05380624090343b5bca55777ce2fa750.pdf
    • https://static.usrfiles.com/ugd/7dd30d_3f8b4bf9f72f4c0bbbe9b5b49399af77.pdf
    • https://static.usrfiles.com/ugd/0dd040_89a1d415efd74c96accede8af304420a.pdf
    • https://static.usrfiles.com/ugd/b8c837_53a242ddfb664530a6fc47c840efeb9d.pdf
    • https://static.usrfiles.com/ugd/b28561_80b4a25baf64442da8ffe4b7b66188e2.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/cake_mania_game_free_for_android.pdf
    • https://static.usrfiles.com/ugd/b47706_c56313b67fce44c587144c2333980979.pdf
    • https://static.usrfiles.com/ugd/097bd5_ea51f3b3e2f64ec19364612c71160a01.pdf
    • https://static.usrfiles.com/ugd/5360f8_516492cfc5334d4b8dd3ba8e11a524a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_975e5c542d0d47c9af56dff02dab188c.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_off000047a7.bin
fb363780c5ef67c8646b775d7980ff652a24e1d4c7ac2df33ede882b3a102dcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47A7 5508 bytes
font_01_sfnt_off00005a48.bin
fcb987ab16d961e2071d5c74d63561f0aa7bd44a41151076d61709a4a16c3e3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A48 9756 bytes

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