Malicious PDF — malware analysis report

Static analysis result for SHA-256 841482472e877965…

MALICIOUS

PDF

42.4 KB Created: 2020-08-29 23:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38f815f9f2c91675acb9aaad90c6e53c SHA-1: d1b13f5eecd8942d506745806f6bd875b2d9229f SHA-256: 841482472e87796552e810c244696c750fb516007d218763c422a436f95d344d
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to contain keywords related to a workshop manual, likely a lure. The presence of a link farm and a malicious redirector suggests an attempt to lead users to a compromised or malicious site, potentially for further exploitation or phishing.

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/wix?keyword=vw+tiguan+workshop+manual+free+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_70113f9ce56d462ebf4fbc15b54bed12.pdf
    • https://static.usrfiles.com/ugd/b8c837_1b71d75ab8ef4596b2a344b295b1484e.pdf
    • https://static.usrfiles.com/ugd/b8c837_b576d709000b491d8c8a9ee063ba444f.pdf
    • https://static.usrfiles.com/ugd/05900a_c0a757a67aa04516918f2fd3922677a3.pdf
    • https://static.usrfiles.com/ugd/b8c837_905a349e35e3427d888c29e42dddf4a6.pdf
    • https://static.usrfiles.com/ugd/b8c837_8c37149fb4284a5ab6f438377b4050a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d9ff9cda2bc4181aee707072540467a.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_eaf929e161704830a620b85b5a4a0a78.pdf
    • https://static.usrfiles.com/ugd/3bca44_caedb120de324517b21bc475bb85e899.pdf
    • https://static.usrfiles.com/ugd/b8c837_0520b94c0f5e4d7682e4512e462c7469.pdf
    • https://static.usrfiles.com/ugd/eb4c03_c99a4cff94a8460b8a0391dc36616223.pdf
    • https://static.usrfiles.com/ugd/b8c837_ca90cdc4ee4248cb9a02fae74eff77a1.pdf
    • https://static.usrfiles.com/ugd/b8c837_8e2ceeff3cc145b5b535b7725b6ce195.pdf
    • https://static.usrfiles.com/ugd/6c032c_4730762236b048b580333aef9244664b.pdf
    • https://static.usrfiles.com/ugd/b8c837_f9cebd65e9344e0396a1a7d47873b8b1.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_off000066aa.bin
dbb53e7ef6864d8818a59f8555c567efaee305d7198fb87d976a3d380026dba5
pdf-font-stream PDF embedded font (sfnt) at offset 0x66AA 5576 bytes
font_01_sfnt_off00007992.bin
49b415025666dbac47d17c61519902443626ea369c9aa302564e7a6d92e0c757
pdf-font-stream PDF embedded font (sfnt) at offset 0x7992 10040 bytes