Malicious PDF — malware analysis report

Static analysis result for SHA-256 99d3dcb2c2c87741…

MALICIOUS

PDF

42.4 KB Created: 2020-08-30 05:58:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b39c97f793f44cba12e8b328a10d611 SHA-1: 6871d6a673e7dd332e92e530041d21dd49443ec4 SHA-256: 99d3dcb2c2c8774121c7c6b6cb0c1d08773d12f9823d00c68fa632348c160421
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for a PDF redirector link pointing to known malicious infrastructure. Additionally, a critical heuristic detected a PDF link farm, indicating an attempt to generate traffic or distribute malicious content through numerous embedded links. The document body, though heavily obfuscated, contains the URL https://ttraff.link/wix?keyword=origins+and+history+of+consciousness, which is likely the initial lure. The presence of many embedded links, including those hosted on cdn.shopify.com, suggests a coordinated effort to 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.link/wix?keyword=origins+and+history+of+consciousness
    • https://static.usrfiles.com/ugd/dc98cc_7e24ff9f1c674294ba4cf4d903446cbf.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e3d2afce0414796b97d8b1b9369c023.pdf
    • https://static.usrfiles.com/ugd/b8c837_84bbaa6a675a47808ba7cc0227446871.pdf
    • https://static.usrfiles.com/ugd/80c1db_c6b06f75c2544eb98cc53836d6766dff.pdf
    • https://static.usrfiles.com/ugd/b8c837_897adf9c4edd4691803fa37a7a654b2c.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66689816557.pdf
    • https://cdn.shopify.com/s/files/1/0432/6572/0486/files/woninujakeneg.pdf
    • https://cdn.shopify.com/s/files/1/0430/1740/4573/files/bufotof.pdf
    • https://cdn.shopify.com/s/files/1/0436/1574/8253/files/tivomoledunowuluteviw.pdf
    • https://cdn.shopify.com/s/files/1/0431/8347/2802/files/87417657739.pdf
    • https://cdn.shopify.com/s/files/1/0431/8072/0294/files/57293663569.pdf
    • https://cdn.shopify.com/s/files/1/0429/1228/4831/files/sipopimakitufis.pdf
    • https://cdn.shopify.com/s/files/1/0435/9841/3987/files/ios_emulator_for_android.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_off0000610c.bin
9eb7050d48435837de537e0a8e5b571f828e556cb1af5e5ae20313d344594e43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x610C 5380 bytes
font_01_sfnt_off00007350.bin
4af28b6a94f2af6d1d7aa27e64d0be9e0767a1990df8e3e659a0f5e03bdfd779		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7350 12928 bytes

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