Malicious PDF — malware analysis report

Static analysis result for SHA-256 58162db071b6e2c4…

MALICIOUS

PDF

73.4 KB Created: 2020-11-21 05:05:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 84fc79e3558ac514f0c44f6066d46ef6 SHA-1: 1689edb635588f0438c58fb65ab904a2b593d7e4 SHA-256: 58162db071b6e2c4d8cbedf3a8f2609646b7d38010de60642edfdb793c72b970
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various platforms. One of these links, https://gettraff.ru/123, is identified as a malicious redirector. The document's structure and the presence of a malicious redirector suggest an attempt to funnel users to potentially harmful content, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/123?utm_term=unseelie+court+dnd+5e In PDF document text
    • https://wojizenufojanog.weebly.com/uploads/1/3/4/7/134724603/649294.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/waxodo-duguwena-revugoraf-waxogili.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/kakupiwuzupa-wipakigogak-zobofega.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/38403ed2-cf84-42ff-812a-3be0ee2f604c/riwales.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/umbreon_plush_template_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5268ec2e-70bc-408c-8285-e5e1500de2f8/bidesunikaxulanikewiras.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a48849e2-957e-4cad-9e5a-2b9e7d86ecf6/sorovupe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78cbd5ab-9c92-42a7-afb2-89ba1eb4ea25/handmaid27s_tale_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0639f95-b505-469e-a03d-97464ac69527/chestnut_hill_academy_philadelphia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c25ab3eb-c4cc-44c2-bc02-522fbd8a8db8/91460029260.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5945df1-47ae-456a-abd8-d1ab6c59ef55/plan_de_negocios_dulceria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92dfb373-ab70-4ed6-be01-9c6acd359c3f/mooligai_in_tamil_language.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbd69ef6-c1f3-4e39-8d22-4ea47829748c/82272649607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96754f09-a67f-4f62-bb27-5789522ce86a/51980917128.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_off0000e20e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20E 4840 bytes
SHA-256: e261d0c766d5e044b268ab3b6a68edfc685e9da5293bf0c27fdb2d093951d2f1
font_01_sfnt_off0000f29c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29C 11832 bytes
SHA-256: 04dc09d05fdba9f4e4cb3dbaafea61acec451876bf7954aaf8374b7ca5e2ed2e

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