Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa9bd66db2e7e087…

MALICIOUS

PDF

61.7 KB Created: 2020-11-09 09:46:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 50db6c2f11b8e33774122deab2ad0fa5 SHA-1: 41516d7c17a6c45a877943e2fb6272aeccc708dd SHA-256: aa9bd66db2e7e0870a8c05fc34e9f6f25cdc8b5125a4cec63b3e3fb694c479d6
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffking.ru/aws?keyword=putlocker+spider+man+homecoming+free+online In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f88c7277492f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://mufepokupi.files.wordpress.com/2020/11/purunagegutawesogirifug.pdfIn PDF document text
    • https://givolajokofe.files.wordpress.com/2020/11/japatewajaliwififu.pdfIn PDF document text
    • https://manetomimexa.files.wordpress.com/2020/11/68091325827.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/digelupaxewo.pdfIn PDF document text
    • https://zuwitapip.files.wordpress.com/2020/11/sivilo.pdfIn PDF document text
    • https://gegosuxo.files.wordpress.com/2020/11/gapuwer.pdfIn PDF document text
    • https://zosuriwox.files.wordpress.com/2020/11/figoluzujotinum.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/unblocked_mario_kart_super_circuit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eadbc71-f813-4c8e-b4a9-ec1c44e9315c/22414168645.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/jibuli.pdfIn PDF document text
    • https://fuzimufitus.files.wordpress.com/2020/11/kijakolezixakegefuk.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009ade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9ADE 5636 bytes
SHA-256: 3bf16027faba679011696c88a238f0ea76074276a156afb04446aceecf9f8e88
font_01_sfnt_off0000ade0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADE0 11232 bytes
SHA-256: 60a7e54d9bdea7afa21825ace776d38f71ed9b1f12bff9efa38d3dafe9709c20
font_02_sfnt_off0000d467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD467 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2

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