Malicious PDF — malware analysis report

Static analysis result for SHA-256 90c608f1d95faf6c…

MALICIOUS

PDF

55.4 KB Created: 2020-08-29 21:40:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2a1aab177b93b28e312ea0dec51963b SHA-1: f5232f539f44ce63570455bb912a09af3a626661 SHA-256: 90c608f1d95faf6c0a9ace521aca303fb45613c7a7b9b6ea48c306d210b7cc5a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.cc/wix?keyword=hitchhiker%2527s+guide+to+the+galaxy+infocom+walkthrough`. The document body, though heavily obfuscated, also contains this URL, suggesting the PDF's primary purpose is to trick users into visiting this malicious site. The PDF also contains a link farm heuristic, indicating a potential SEO poisoning or spamming attempt.

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=hitchhiker%2527s+guide+to+the+galaxy+infocom+walkthrough
    • https://static.usrfiles.com/ugd/cf14a4_d0b2ccd88143448e893dfd4b87a89fe0.pdf
    • https://static.usrfiles.com/ugd/b8c837_cb202433613e44efa46ec4588a2dae1e.pdf
    • https://static.usrfiles.com/ugd/26481d_52cde0ef83c54d4bb93c9015f7f0265f.pdf
    • https://cdn.shopify.com/s/files/1/0430/9814/4932/files/oring_home_depot.pdf
    • https://cdn.shopify.com/s/files/1/0429/2545/7575/files/company_profile_template_psd_free.pdf
    • https://cdn.shopify.com/s/files/1/0445/5959/7732/files/mijunere.pdf
    • https://static.usrfiles.com/ugd/b8c837_614345f4df674ab5bdd4266c150813d2.pdf
    • https://static.usrfiles.com/ugd/b8c837_d4bbf5e719574c79bce01678a7fabdd6.pdf
    • https://static.usrfiles.com/ugd/b8c837_361361c48d774611bbb67d4743eaf568.pdf
    • https://static.usrfiles.com/ugd/b8c837_d5334062b76041b4906fa610bd60d58a.pdf
    • https://static.usrfiles.com/ugd/b8c837_e43cd70dca8b46ba9686f78f1d9aba3d.pdf
    • https://static.usrfiles.com/ugd/6cf392_ecf919eb1c034f71b8055f9af4bc6a9e.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_off00009919.bin
e348a72406340bc3ab60dc49e9ce21a652eb337e4320025b3281519aff18d668		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9919 5756 bytes
font_01_sfnt_off0000aca0.bin
95d90c4d99ce25c2d5524d28530e995692d633a97e2d89d1f0e3f6c9e9db688c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACA0 10364 bytes

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