Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcfb1babbac018c5…

MALICIOUS

PDF

83.0 KB Created: 2020-10-31 18:47:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0229162ef29069a70e96740e86b3a2d7 SHA-1: 2a368053a87c5117b9689d02756c68cb433955df SHA-256: dcfb1babbac018c561f2e02a8b1d490b47f6ddebcd54332568461da23110cf80
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/123?keyword=selective+attention+psychology+paper'. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the nature of the redirector suggests an attempt to lure the user to a malicious site, likely for phishing or to download a secondary payload.

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=selective+attention+psychology+paper In PDF document text
    • https://cdn-cms.f-static.net/uploads/4386095/normal_5f8faa66a1623.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383800/normal_5f9304ae036d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377379/normal_5f9068f9013b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422168/normal_5f984361bc8bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368235/normal_5f879f3b4cf4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421768/normal_5f9761f0cef8e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/leguvefu/97845380006.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72b57e93-e8b3-4f1e-8a6c-90404b0a47de/torimeg.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/rukodujupozexofalikatezuk.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/all_airport_name_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c4d7d7f-f57b-4a8f-a893-e1b1c46400bb/xeboputenasig.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E8 5460 bytes
SHA-256: e80ef6c22dcddced61a08dec5b71cf3130b5b92c8ef79b542bacdb7232e5dfea
font_01_sfnt_off00011982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11982 11104 bytes
SHA-256: f8f27fd713fd3438db6adda90a531d92d1d246a0def2cabb10e401e2c2404eff