Malicious PDF — malware analysis report

Static analysis result for SHA-256 7945fd1fc3da36b9…

MALICIOUS

PDF

43.3 KB Created: 2020-11-03 22:58:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62f610f27df43ece893ec6ab8cd30b04 SHA-1: 1258ba41a76e66a6603581ac408e8890a6d3a521 SHA-256: 7945fd1fc3da36b9b0a13826abea55760ff982c692a5fe840fd980b1264b97c1
94 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'night vision scopes' and the malicious URL, suggesting a phishing or social engineering lure. The ML classifier also strongly flagged this PDF as malicious.

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.
  • 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.me/123?keyword=night+vision+scopes+for+rifles
    • https://cdn-cms.f-static.net/uploads/4369626/normal_5f9bec1ab4744.pdf
    • https://cdn-cms.f-static.net/uploads/4413977/normal_5f9880f58bf5a.pdf
    • https://pivubetipu.weebly.com/uploads/1/3/4/3/134328131/gosepofevotov-ragudute-xevibetekoxere.pdf
    • https://cdn-cms.f-static.net/uploads/4416798/normal_5f9c4a078b5cd.pdf
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/koloro.pdf
    • https://cdn-cms.f-static.net/uploads/4368494/normal_5f8822977d8ec.pdf
    • https://vedegidimojota.weebly.com/uploads/1/3/4/5/134597995/9726283.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tugumeb/career_step_coding_practicum_answers.pdf
    • https://s3.amazonaws.com/jeworurowam/72012227714.pdf
    • https://uploads.strikinglycdn.com/files/d4684613-60c4-4cc6-b552-49453c662f29/witopopetijifazefaso.pdf
    • https://s3.amazonaws.com/penefelomiju/tulumeferuparega.pdf
    • https://s3.amazonaws.com/gateme/90742819878.pdf
    • https://uploads.strikinglycdn.com/files/68639328-a58e-4ab8-80fe-b64629b9a023/26410846306.pdf
    • https://s3.amazonaws.com/zuxadol/commutative_associative_and_distributive_laws.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_off00006b2f.bin
743fbdfb6f1df28a5fa44f235c022041763c4fa738c0e0124e2a743954ae2480		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B2F 5096 bytes
font_01_sfnt_off00007ca1.bin
1bef052970b82495cf71ef4a61d8662388058fce31ae8981b088935edc79bb04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA1 10404 bytes

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