Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb6aa726e70542f0…

MALICIOUS

PDF

75.7 KB Created: 2020-11-17 10:04:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 2a0eb165334ae9bedb984ec0cda960ab SHA-1: 15547cd8dc71a2e32a497d169d383109529137ea SHA-256: fb6aa726e70542f0ec051be94cc00e2f00a8d30f256b0c878e05418bccbcb63d
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The embedded links, such as https://cctraff.ru/strik?utm_term=elaboracion+de+shampoo+pdf, suggest a phishing or content-scraping campaign. While no scripts were explicitly extracted, the PDF structure and link farm heuristic indicate an attempt to drive traffic to external, potentially harmful, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://cctraff.ru/strik?utm_term=elaboracion+de+shampoo+pdf In PDF document text
    • https://pawomasa.weebly.com/uploads/1/3/4/7/134737305/firofapawiwegimadon.pdfIn PDF document text
    • https://wepoduxusuduxi.weebly.com/uploads/1/3/4/3/134306179/xewidelugix.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/d3d1bda7-66de-4617-b3d7-19939c633f61/bivonufabizoki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d14deb8-fc32-4e0a-a0fa-aae43ff5a22e/pimolajovupar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2684584-0e95-469c-97dd-26957c7369ab/tekajifajugamusozofuvoze.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/66973240074.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/tor_browser_download_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6aba54f4-3a95-43a2-957a-3b7619eefec8/ziluguwivujob.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/love_warrior_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/hopelessness_scale_beck.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/cells_building_blocks_of_life_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/40483954066.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_off0000e8f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F1 5492 bytes
SHA-256: 30e39cc9128ebb941ec9d8de14dd325dbbf5c531f6962f77f42b53beb6193330
font_01_sfnt_off0000fb69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB69 11464 bytes
SHA-256: 8a4765b0681aa37a80ecd36fd944d48f243d9d6256f75c99c7735942af40a489

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