Malicious PDF — malware analysis report

Static analysis result for SHA-256 6feef2bae58d7ff9…

MALICIOUS

PDF

60.6 KB Created: 2020-11-04 02:41:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3fed402223df780048a6ebe44676e43 SHA-1: 179077cda139792ecb2066a050d3627bc27b9320 SHA-256: 6feef2bae58d7ff9e6b7701a143b890e0f217f5076a9cb48eba8a6b5aeec3ea4
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 and the ML_NYX_PDF_MALICIOUS flag. The document body, though heavily obfuscated, contains text related to a "Denmark pressure cooker instructions manual" and the wkhtmltopdf application, suggesting a lure to entice users to click the malicious link. The embedded link is the primary indicator of malicious intent, likely leading to a further stage of attack.

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.ru/123?keyword=denmark+pressure+cooker+instructions+manual
    • https://cdn-cms.f-static.net/uploads/4365541/normal_5f96f91f0e18c.pdf
    • https://nexezosig.weebly.com/uploads/1/3/4/4/134460983/sofawa-rojawefobibej.pdf
    • https://cdn-cms.f-static.net/uploads/4384167/normal_5f8f916f38dc9.pdf
    • https://zotadipijipas.weebly.com/uploads/1/3/4/4/134467791/gaxidawudosorewudat.pdf
    • https://cdn-cms.f-static.net/uploads/4377925/normal_5f9a800f8fabe.pdf
    • https://cdn-cms.f-static.net/uploads/4369784/normal_5f9be5406d23d.pdf
    • https://cdn-cms.f-static.net/uploads/4369328/normal_5f8cf0cc5696c.pdf
    • https://cdn-cms.f-static.net/uploads/4370074/normal_5f956d667861c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jojitagifuva/diretineletapojaze.pdf
    • https://s3.amazonaws.com/suxiweke/woxoposuzasejemurat.pdf
    • https://s3.amazonaws.com/dozuga/arras_del_espiritu.pdf
    • https://s3.amazonaws.com/dixaleko/tratado_de_auriculoterapia_download.pdf
    • https://s3.amazonaws.com/kagedatabujo/86315107427.pdf
    • https://s3.amazonaws.com/rovotafavap/wopobi.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000b246.bin
3049b1c77aed90fc05efd796bcef253fd73601c901ee1e76fc5b2681fb8da676
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB246 26476 bytes
font_00_sfnt_off00006f3b.bin
9f093f3bd9022a8f487d114f7de10c428cd68d6c1a7b562474ceae6ec935d236
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3B 3028 bytes
font_01_sfnt_off00007a1e.bin
f01e495f4fb9e9c59dda7686c343b17c48470f251c87e8fe83fa58d687762052
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A1E 5144 bytes
font_02_sfnt_off00008b8a.bin
528369dc1f4408f0b499178a2036e92ca27e500508924718a035210a8f0c6b78
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B8A 12184 bytes