Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b359a00f99a7fd9…

MALICIOUS

PDF

40.8 KB Created: 2020-08-31 21:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15e2c89bfc5d8351ef98e2a9e3983239 SHA-1: d27d6de10e50ee2d1b02fbc073547c887841ffc6 SHA-256: 6b359a00f99a7fd9cd9be9d9dcbb05b15c70ba75b572d7eff71b69bf5d7c73c7
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs that point to a known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though partially corrupted, suggests a lure related to 'sheet music', which is a common tactic for phishing or malware distribution. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' strongly indicates malicious intent.

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.com/pify?keyword=stay+rihanna+piano+solo+sheet+music
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/d4da64_e8dde384ff0c4d27b5caff8554b63a13.pdf
    • https://static.usrfiles.com/ugd/2c608b_62438d480f75464ba1cf2eeef06a450c.pdf
    • https://static.usrfiles.com/ugd/0d089b_9458acbc9afd4f30baf2ce8c84b1849f.pdf
    • https://static.usrfiles.com/ugd/a107db_dd61f3c6a38e4fe1ad514c3ca8dbf134.pdf
    • https://static.usrfiles.com/ugd/b8c837_9484169f27cb4bb9ba43388afdc33d1b.pdf
    • https://static.usrfiles.com/ugd/b8c837_18a232c8759f4d7281a2f901e6568b7c.pdf
    • https://static.usrfiles.com/ugd/b8c837_7d37cacaac1b4d3b83e38fa871d2ed5f.pdf
    • https://static.usrfiles.com/ugd/b8c837_d238e8a2d67e4e41911288f40a2d4cc3.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c44688fb1614e98a61eb30f5d19554f.pdf
    • https://static.usrfiles.com/ugd/eda9ba_874aa85dc8dc4296aad7471ec554d2d2.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_off000052fa.bin
f83075ab13ff1437267fb4a1529b3cadf038733a5acadc4be102bfaafe2f9831		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52FA 5376 bytes
font_01_sfnt_off00006523.bin
98c80bc7edc6c8b6e6b39f6e15fc322778e392f63ca196f7fe779644831487bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6523 15112 bytes

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