Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6a6871bb86f9c42…

MALICIOUS

PDF

51.0 KB Created: 2020-08-30 15:50:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c12b2fdd4b493cc035772f22407356b SHA-1: 5f8dd5edc06015fbb25ead69504a39109ce1f36c SHA-256: f6a6871bb86f9c42caf090f9aa4c01572d3b386f0df3b26728158319f335bf9a
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=detroner+le+roi+des+terreurs'. The document body, though heavily obfuscated, contains this URL and text that appears to be a title. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring the user to a malicious site via the embedded link.

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.
  • 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.
  • 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=detroner+le+roi+des+terreurs
    • https://cdn.shopify.com/s/files/1/0430/7258/5888/files/48838911332.pdf
    • https://cdn.shopify.com/s/files/1/0431/3913/7697/files/7227185677.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/winoxilerudizixadejugo.pdf
    • https://static.usrfiles.com/ugd/b8c837_322e4f4a2bfd41cbb1aa844cf6c76590.pdf
    • https://static.usrfiles.com/ugd/d7ba0f_2919e0896eea4b54b46723d1d9152b32.pdf
    • https://static.usrfiles.com/ugd/b8c837_e71e2132e20b4d69be56b8fe8620941c.pdf
    • https://static.usrfiles.com/ugd/930050_cd10900589354b9e92aef47aa5442f33.pdf
    • https://static.usrfiles.com/ugd/b8c837_fa3f79f315344e1b9542d8b04c15f966.pdf
    • https://static.usrfiles.com/ugd/b8c837_fc25af426ad04839a74d89c065067bb3.pdf
    • https://static.usrfiles.com/ugd/b8c837_0444f4670e5641759cd886d5c46e78c8.pdf
    • https://static.usrfiles.com/ugd/b8c837_a79fbc4fff6349d8a55de628fba08f0e.pdf
    • https://static.usrfiles.com/ugd/269bb8_994572f996594f9980f3888320fa3fcf.pdf
    • https://static.usrfiles.com/ugd/b8c837_f17c6554e1ce4a27b2ea7a8688aa29ca.pdf
    • https://static.usrfiles.com/ugd/b8c837_9ebb990a82c140de998cf1f85cacf811.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_off00008533.bin
57358eff4c87f586441b9b0a31d3ec1b41bce3a6358d8ffe4d146a6101782aee
pdf-font-stream PDF embedded font (sfnt) at offset 0x8533 4608 bytes
font_01_sfnt_off000094ea.bin
a29d9f9bf08c7a1d8dedba81cd1a82718a197fc3237ab4429908004f42acff0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x94EA 13460 bytes