Malicious PDF — malware analysis report

Static analysis result for SHA-256 5331035e3d4d3b09…

MALICIOUS

PDF

60.7 KB Created: 2020-12-09 01:07:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ac2e91ad20f797cbbbad6a254b1d463f SHA-1: 8453ab3e428470af0e52573506be0613d0a653d5 SHA-256: 5331035e3d4d3b0987478d40146b2d2f78f6abb0487262b6ec0a869c10294c9e
214 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying it as a PDF link farm designed to redirect users to malicious infrastructure. The primary malicious URL identified is 'https://cctraff.ru/strik?utm_term=minnie+mouse+cake+topper+amazon'. While no scripts were explicitly extracted, the PDF structure and the presence of embedded URLs suggest an attempt to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=minnie+mouse+cake+topper+amazon In PDF document text
    • https://tusemebi.weebly.com/uploads/1/3/4/3/134316443/3498508.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe055fcb3e0f5771155d0e/1606288735650/zadabiwugazuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cb3432c-0840-441a-bd5d-e4be2224e105/jamie_eason_day_3.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6bd3d63393450184f45d4/t/5fcb734b21c0486e9194970c/1607168843344/pufagumigigifefefigo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1f46eaf37e3b646474a1/1606295366380/vagivuredab.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d2420a2757459b04ad16/t/5fc83550d32d012678f1450e/1606956371731/disordered_eating_in_a_sentence.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6e68b04a8c57c14870b46/t/5fc9f813ec1d586fb391338f/1607071763961/kixixadegukerip.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dd9b8ef7301f8b108504/t/5fce6def643bc901cd374b5b/1607364080322/crowd_control_twitch.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc682c33dfdd95b60fbd085/t/5fcfb4c00ff3944fc566b896/1607447745437/51471216140.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/tojezexo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0cf44e5c7695ca99b2c1d/t/5fc12c82cb3e0f577179adfc/1606495362643/sleeping_tree_camp_portal.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/winter_flower_arrangements_ideas_for_table.pdfIn PDF document text
    • https://s3.amazonaws.com/zukukelejurotef/10595049433.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/36141514481.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_off0000b384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB384 5168 bytes
SHA-256: 2b59cea8bd033aa7b7cbad67dcc51eb84ab9fa4190721862fa758b7237d6eea7
font_01_sfnt_off0000c513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC513 9808 bytes
SHA-256: 8b74608df40662ea6343a52dc4b1ef13a7b719e6df7aac57bb1f573385405fff

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