Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9f311ae72ecfbfd…

MALICIOUS

PDF

38.9 KB Created: 2020-10-26 21:53:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f0aac25aad68532f8393f57bf58d9837 SHA-1: b7c7b8d79b8567850b47924bd354d036686b8bfb SHA-256: e9f311ae72ecfbfd4ca17c76da125edfea35b475f6b62e6b8ed216e24c71977e
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which points to 'https://cctraff.ru/strik?keyword=five+feet+apart+netflix+canada'. The document body also contains this URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to benign Shopify domains. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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?keyword=five+feet+apart+netflix+canada In PDF document text
    • https://tenasusuboziwid.weebly.com/uploads/1/3/4/3/134349012/konasin.pdfIn PDF document text
    • https://votawaxamudogop.weebly.com/uploads/1/3/4/4/134400347/pumibe_xezegaxifo_jajetezipa_wodajuna.pdfIn PDF document text
    • https://wugusuza.weebly.com/uploads/1/3/4/1/134131733/605506.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f8ad560d2746.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_5f870b1485849.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5f88a57717410.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374188/normal_5f901e804ca1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5f8b67e3d4d75.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9050/9973/files/diccionario_biblico_vine_para_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7922/8837/files/bmw_g30_5_series.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5328/4008/files/farming_simulator_18_revdl_com_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/employment_insurance_compassionate_care_benefits.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f106aca5-0e5a-4857-a925-667bae55471f/elementary_statistics_6th_edition_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fc7321e-ec87-4649-9c9b-ee8fb61fd910/78339672831.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3f0ef75-cd86-446c-b1d5-42271c76c02b/12042051323.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db4fe002-ef01-405b-8925-34955d981123/94872933856.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_off000058ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58EC 5052 bytes
SHA-256: b17a140e736796a9202115b232f5832093a8a901945f5c062d5e827761a66688
font_01_sfnt_off00006a2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2F 11008 bytes
SHA-256: d5e386fbcb26e599544756adcd6843747ecb78b71913888f102446264cb17845

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