Malicious PDF — malware analysis report

Static analysis result for SHA-256 b96a7efc0666dad9…

MALICIOUS

PDF

59.7 KB Created: 2020-11-14 10:22:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 08383c750d9101e443c1e9caa745eb8f SHA-1: 09bbc2ada5e210222851c6792330a969d7daf835 SHA-256: b96a7efc0666dad9c6dcb81b09c5c1f4578f02b12ff581bdf0bde5fc1dfe7d41
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier, indicating it likely serves as a phishing lure or malware distribution vector. The embedded links, particularly to 'ggtraff.ru', are identified as malicious redirectors, suggesting the document's primary purpose is to redirect users to harmful sites. The presence of numerous other PDF links further supports the idea of a link farm or a mechanism for distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://ggtraff.ru/strik?utm_term=effet+de+levier+financier+formule In PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/816319e893468.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386613/normal_5f8d003d61f0a.pdfIn PDF document text
    • https://nudopimiga.weebly.com/uploads/1/3/1/0/131070212/c8b653ba65fef0.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/5712ab23-07fa-47be-bfe6-0099c05520aa/48062692058.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/affinity_designer_workbook_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d517490-328e-4cfc-9ae0-91618a00d273/55839791849.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4294a918-a010-44bc-9fb8-1abc684137f1/jetaxesurudofuwer.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/78252856566.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbcaa4b0-96df-4373-a15e-380fcffa0ba4/6_month_anniversary_ideas_for_her.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbd3b632-bae8-4acd-95cf-a78da7ccb567/hsa_biology_spring_break_packet_answers_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a6adb28-aa99-490e-91a3-27bb054ef759/kezuxumuli.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_off0000adbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADBD 5008 bytes
SHA-256: 830b5466c2318b3fcc3c7b9c5ff6544089a6a66ae25696b3ef1ddbcb1670c2c7
font_01_sfnt_off0000bebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEBD 10632 bytes
SHA-256: 2495fbd5b1a0699baf271d7eefca1b94fdd7d4c4d0292e1613f9ea9555e0853f

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