Malicious PDF — malware analysis report

Static analysis result for SHA-256 445cac99273f3ff3…

MALICIOUS

PDF

44.0 KB Created: 2020-08-30 05:32:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2108d175bd8130294e72bd9676252fd SHA-1: 775b488c4389ff823387cc445c3070162411aad1 SHA-256: 445cac99273f3ff3dfb762880d1b95937750870f9850ab8f58e936ee4a174712
130 Risk Score

Malware Insights

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

The PDF file contains a link farm with 22 external PDF links, many hosted on Shopify, and one critical heuristic firing indicates a malicious redirector link. The document body, though heavily obfuscated, contains text suggesting a 'game guide' lure. The primary malicious IOC is the redirector URL, which likely serves as a gateway to further malicious content.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=deluca+family+game+guide
    • https://cdn.shopify.com/s/files/1/0430/7940/1634/files/antennas_and_wave_propagation_lecture_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/3019/9966/files/79408992268.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/sezimusikegojuridibibegek.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/liwisubusamepumiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/8560/2721/files/46401145856.pdf
    • https://static.usrfiles.com/ugd/b8c837_8341131268b34d49abf5fd162fc899af.pdf
    • https://static.usrfiles.com/ugd/b8c837_feaca2158ed345b5a23ce8cb5d1b11aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_0c5ba7c84fd74f85ab0867e590cdab2d.pdf
    • https://static.usrfiles.com/ugd/b0b521_707103ea568d4fe6a80ad223f76e3e20.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/16439200734.pdf
    • https://cdn.shopify.com/s/files/1/0431/5149/1236/files/duzuxejomorizinekud.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064ba.bin
6b42e1fae31ce6735ccf0b1fa95d410492041a136d470365715cb66b10a9c900		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64BA 5168 bytes
font_01_sfnt_off0000764c.bin
b3bf58635a6616fd2d8175ab3fbe708eb5bfca77e3127467f16db21786c1078b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x764C 1648 bytes
font_02_sfnt_off00007e97.bin
fb5cc586476732e454f1b90726c8e1e422a8776d58d11c6ec138d4bb51b628fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E97 10896 bytes

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