Malicious PDF — malware analysis report

Static analysis result for SHA-256 700301a561214bde…

MALICIOUS

PDF

59.6 KB Created: 2020-11-10 00:43:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7b2554a062035130fabf7c9eeceea4ec SHA-1: 15e9b41facbf2a55a95f9ac5d362a044e000619d SHA-256: 700301a561214bde183e6a87f95b23a259299cdff12e5d27bf9f590c3c737199
154 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'https://traffine.ru/strik?keyword=words+that+start+with+dis+prefix'. The ML classifier also strongly flagged this PDF as malicious. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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.
  • 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://traffine.ru/strik?keyword=words+that+start+with+dis+prefix In PDF document text
    • https://cdn-cms.f-static.net/uploads/4404969/normal_5fa6a67e29e4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5f8886ba155ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417990/normal_5f9b8cb690032.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/sazixipame/5360285598.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e93ac58-2660-417d-b2fb-704de325063b/94252620105.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/siwal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a481f647-51d1-4c71-92bb-ce9b1296709c/visimogajosijupez.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/wolfram_alpha_sum_of_series_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/aircraft_engine_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa9a523d-bf29-4d3b-9269-9213bc1b5bb3/ruviwuzijalenuje.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/babomene.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_off0000add2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADD2 5268 bytes
SHA-256: 02e05c2b8708a55e3b636106e325e3714f489e2dd95500a6ddf0edcd8762248a
font_01_sfnt_off0000bfd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFD6 9884 bytes
SHA-256: 1c0813c32bee69d5d6d304b3d483309931ddc14567abc89896d6b04e16b81668

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