Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a0ee63c59aa90d…

MALICIOUS

PDF

86.7 KB Created: 2020-11-24 01:39:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d3e80dc7f5895f232373af63c0556af3 SHA-1: 75421e236edbcca7ecce54b20d49819bffff9639 SHA-256: d2a0ee63c59aa90d9aa1b4db4288d1869b7a3b182e9ec4ed4ff2db216fae52e8
214 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a link farm designed to redirect users to malicious infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to 'cctraff.ru', indicating a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure and link farm suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/aws?utm_term=technical+data+sheet+means In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383136/normal_5f8e8ffab6f69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404528/normal_5fa359207a27c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389794/normal_5fa72ec110c2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458388/normal_5fa46e1b3af6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446507/normal_5f9e9422125bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462732/normal_5fa38333c7300.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461485/normal_5fa474627eb41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424935/normal_5fb58476cb436.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473637/normal_5fa8657f13171.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393761/normal_5fa9c915e2538.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458615/normal_5fa61fe397eb4.pdfIn PDF document text
    • https://vabijerokajesi.weebly.com/uploads/1/3/4/5/134595953/5000454.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000115c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C6 5032 bytes
SHA-256: 231bf7eba810bebf99bbd2ccdd58f59b15d65c674cd5fa3c26c22e0a312cacb9
font_01_sfnt_off000126ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126BA 11772 bytes
SHA-256: c3a53c9bd44bc41e84f134ea113ad2ec00d4f19e5697220af3a1ccb9379812c9

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