Malicious PDF — malware analysis report

Static analysis result for SHA-256 96440b3bef2a3387…

MALICIOUS

PDF

44.6 KB Created: 2020-08-28 04:02:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8f89b21ad581e2e564c23761fa9fc04a SHA-1: 676d4ca09faad81a66589f740368e51b196402c6 SHA-256: 96440b3bef2a33875bdad1fb56665089b5b4646f70d5cb4e114ec008358911d9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, with one identified as a malicious redirector. This suggests the document is designed to lure users to external, potentially harmful, websites. The ML classifier strongly indicated maliciousness, supporting the assessment of a link farm attack pattern.

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://ttraff.link/pify?keyword=innova+3320+manual+pdf In PDF document text
    • http://files.desertdeerart.com/uploads/1/3/1/0/131070561/dipogitepupififu.pdfIn PDF document text
    • http://ditebe.laurendfulter.com/uploads/1/3/1/3/131398455/53338a7ce7.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/1/0427/6636/8935/files/catalogo_natura_ciclo_8_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7480/4119/files/tofavafabapijojotidop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9617/7816/files/5650689365.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1570/8573/files/lekizomofuvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1325/7885/files/free_timeline_powerpoint_presentation_templates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3923/3960/files/4_week_lean_muscle_workout_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/57223084459.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5091/6247/files/72552038133.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6320/6307/files/gobaxalipofowomito.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8663/3374/files/dedomiruxadajosop.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_off000063de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63DE 5348 bytes
SHA-256: d5e0ddd74ac73013a8f7b069b44a6fce6ebc0fc2e8196f311ec751fc6070c5b3
font_01_sfnt_off000075fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75FA 15436 bytes
SHA-256: d982bc96cb7346b8c0564913aa0468db7a5c6102d991088c7077189836466168

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