Malicious PDF — malware analysis report

Static analysis result for SHA-256 427104b620162aaa…

MALICIOUS

PDF

69.9 KB Created: 2020-11-14 03:52:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 511b1e99ecb7a94437f269c5baf09323 SHA-1: 1c03a5215ed23fa8591d58b05344ebc08c9e8e63 SHA-256: 427104b620162aaae404961c5e114f01208b0382377b8ddfe8d158a7a5c60040
202 Risk Score

Malware Insights

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

The PDF file contains a lure for a "travel expenses form template" and includes a critical heuristic firing for a malicious redirector link. The ML classifier also strongly flagged this PDF as malicious. While no scripts were directly extracted, the presence of a malicious redirector URL suggests the document is designed to download and execute a second-stage payload, likely through a mechanism that would involve JavaScript execution within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffmen.ru/aws?utm_term=travel+expenses+form+template In PDF document text
    • https://s3.amazonaws.com/ruzaganog/costco_desks_home_office_furniture.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/storytelling_books_for_kids.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/nixesusoninaro.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/wancle_sous_vide_cooking_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373778/normal_5f95198e9bd9a.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/bts_songs_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/rekanokenojeperapinobo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426820/normal_5fa34b13afe21.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/23832460071.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/49995813930.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408881/normal_5f98ce623a8c7.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/mokinekitawunowoziwesila.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/78647969830.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/adding_fractions_unlike_denominators_worksheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e0d1c79-30fd-4b70-9a0e-847645432fba/neoliberalismo_breve_historia_del_infierno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b743aa9f-0adf-41b7-bf0d-511fe7420ca7/54408255405.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_off0000d67a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67A 5124 bytes
SHA-256: ebaa4a27754a176386c999e0a8f1f103d0e7f6859a8597856bad3d04a78c45e7
font_01_sfnt_off0000e7da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DA 10108 bytes
SHA-256: 6dc863286981b2f24f9ac03bfc955755fecc94e9342bd9b40ae5c672f8d3fe34