Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0b5abc9ef80ab32…

MALICIOUS

PDF

40.5 KB Created: 2020-08-29 05:33:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa5e5c1eae558adacc3224f8c4a5d725 SHA-1: 63e1a9bb958e06f3f726504e0b2ccb8ac504ace6 SHA-256: b0b5abc9ef80ab322f3ff8ab6fcabf69aae75b2eeeddb1180e54cd9477b46418
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/wix?keyword=fallout+new+vegas+how+to+beat+ulysses', is designed to lure users to malicious infrastructure. The file also exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains, likely for SEO manipulation to increase visibility. The ML classifier strongly flagged this PDF as malicious.

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=fallout+new+vegas+how+to+beat+ulysses
    • https://cdn.shopify.com/s/files/1/0431/3756/4838/files/pizegemexuxetebim.pdf
    • https://cdn.shopify.com/s/files/1/0434/9385/1302/files/allison_automatic_transmission_operator_s_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/pusalunexewogapawodav.pdf
    • https://cdn.shopify.com/s/files/1/0432/8819/9332/files/tezemifulujutunituxu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5236/files/pakuxizigakawolusama.pdf
    • https://cdn.shopify.com/s/files/1/0433/0812/2270/files/waxivupedagukalupe.pdf
    • https://static.usrfiles.com/ugd/b8c837_82f703b384d34b78ba881e3ff4c92b8a.pdf
    • https://static.usrfiles.com/ugd/b8c837_b3118e2f9e9b4b358d7ff7f947133adf.pdf
    • https://static.usrfiles.com/ugd/b8c837_e0e62151f5aa4009897c31c951668580.pdf
    • https://static.usrfiles.com/ugd/b8c837_d29c27e147c94f83a57bab91cceceba3.pdf
    • https://static.usrfiles.com/ugd/b8c837_2e96e287717143d9baa199985c5b2211.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_off00005ff0.bin
05f5d67db6515cfe415a7555dd4a69360f4f1fcdb80179209b04d45513846742		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF0 5200 bytes
font_01_sfnt_off000071c4.bin
4faa8ac0a79421966581374c50c2eaabf5e25e9d9fa2540f6c8202792b2bfc77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71C4 10292 bytes

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