Malicious PDF — malware analysis report

Static analysis result for SHA-256 60af139e5c45698a…

MALICIOUS

PDF

40.9 KB Created: 2020-08-31 01:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 863ca66f1c827ab84a4306aff56f7fa3 SHA-1: ce0961a65066c4dd4957a5fec6dbb5e646739cf6 SHA-256: 60af139e5c45698ad0fa78c494d0687b7461dcd1d9aa446b7946c84be4ecfdc9
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a malicious redirector link, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK, which points to 'https://ttraff.cc/wix?keyword=danganronpa+v3+free+download'. This link is presented in a way that suggests a download, as indicated by the SE_DOWNLOAD_BUTTON heuristic and the presence of the phrase 'Danganronpa v3 free download' in the document body. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=danganronpa+v3+free+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/4292/0865/files/honeyguide_khoka_moya_tented_safari_camp.pdf
    • https://cdn.shopify.com/s/files/1/0435/0961/2712/files/56130657473.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27055139941.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vemuvuferakodumi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/fagaliwopejeletipopoxatit.pdf
    • https://static.usrfiles.com/ugd/8d57bd_2c06e59ec8aa443f841f35fec5bff3a9.pdf
    • https://static.usrfiles.com/ugd/d2751c_c7095180891d47aca2a7cd21cbd7d3cc.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a5429fb92584a7bb02156c4b63fd2da.pdf
    • https://static.usrfiles.com/ugd/bae363_db6564c18bbc4ccf95cf07ed15d0c7f4.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060a4.bin
bb8950d445247911110a99a4af5dd45c1a9c462217537773152d74d4f36ba007		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60A4 5348 bytes
font_01_sfnt_off000072fd.bin
dae7c8640445f2f0ba49c31f9e967ba691311f1de75d4bb0db09cc052235d509		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72FD 10612 bytes

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