Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b72dcd698d05156…

MALICIOUS

PDF

41.0 KB Created: 2020-09-11 02:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aaf3131d43d5422cb1a4804307c2af2f SHA-1: 6c43689f91fdfab994a49751b2f0955d9d4c61bb SHA-256: 1b72dcd698d05156bc17020fdf17d64b5d91fd0a31ee88638c0bac17f740eb66
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary malicious redirector URL disguised as a voucher card template. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL and references to other PDFs, suggesting a phishing or redirection attempt to a malicious site.

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.link/wix?keyword=voucher+card+template+free
    • http://files.redeagleranch.com/uploads/1/3/1/4/131482954/2737580.pdf
    • http://xekirin.alexandraroth.net/uploads/1/3/1/0/131070705/3756106.pdf
    • https://static.usrfiles.com/ugd/35c6e2_48b65000a33548b5ac9ae94cd2388fdd.pdf
    • https://static.usrfiles.com/ugd/81ef4b_bf5ccb3dde3941ee952f1c974791d2d3.pdf
    • https://static.usrfiles.com/ugd/d1d005_bcd3004168794b2f94dc819098e0cae0.pdf
    • https://static.usrfiles.com/ugd/a31856_1fded58501474ea28cbdd32afbe979a7.pdf
    • https://static.usrfiles.com/ugd/451461_dc1429c209a54588b09b0558cea11daf.pdf
    • https://static.usrfiles.com/ugd/c5d40f_c508da812a1d44a8922daf0da44e5eb3.pdf
    • https://static.usrfiles.com/ugd/cd1d52_9ea1d2c45dcf435285afe2cc285b0fbd.pdf
    • https://cdn.shopify.com/s/files/1/0430/1992/7713/files/3985474252.pdf
    • https://cdn.shopify.com/s/files/1/0464/6486/0312/files/78612850394.pdf
    • https://cdn.shopify.com/s/files/1/0430/7822/1973/files/sudalewegumuzipemobada.pdf
    • https://cdn.shopify.com/s/files/1/0431/0777/8711/files/mutanaxusonevulo.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_off0000632c.bin
70f92ca73b9efb2db7a458689d97339a7d7a60fa6a6f026976588217733a8890		 pdf-font-stream PDF embedded font (sfnt) at offset 0x632C 5180 bytes
font_01_sfnt_off000074a9.bin
b93e874a57a5f6d89ce3ad5f96c251abd5e98198e7b90c5bacd422a76b29f829		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74A9 10216 bytes

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