Malicious PDF — malware analysis report

Static analysis result for SHA-256 a06f70af11fba215…

MALICIOUS

PDF

33.8 KB Created: 2020-11-05 05:40:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a226bafdf1a4c76a31abe1fce2ca8317 SHA-1: 79f726847427cff89fabe4fccb3e5c3212fc3cf6 SHA-256: a06f70af11fba215b2aca0bb7c0d8e9115f21108bf51add176139c61ac982e59
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The document body and embedded links suggest a lure to external websites, likely for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector and link farm.

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://gettraff.ru/123?keyword=good+guys+vs+bad+guys+unblocked+games+66 In PDF document text
    • https://xuwuperozaposa.weebly.com/uploads/1/3/2/3/132303395/renifew.pdfIn PDF document text
    • https://xipunozelizu.weebly.com/uploads/1/3/1/3/131382486/450a4f.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/9b0bb2bf-11c4-49a7-a33e-789da64e2a58/casio_wave_ceptor_illuminator_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edaca10a-538e-4413-839a-9f14f7b2e77a/87435993814.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/dakafiximufoserufowowen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/005cfb8a-713c-4778-8b04-68a8652a8ec1/56442229267.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dfc569a-68d4-474d-98bc-837cf6818d16/6569740654.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/ionization_of_weak_acids_and_bases.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/wenitewuvobutinum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8434/1950/files/iowa_high_school_wrestling_tournament_2020_watch_live.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bf12ca5-88c8-4884-8d11-a78d6fb3a7f4/75941677401.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2124b0da-5e4d-44a8-a1c3-0916219f2f32/siwazomamijagavofoj.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_off00004449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4449 5716 bytes
SHA-256: a702bc59ef4ea9f2ec41f99d8d6fbb691bb07c268750dc31f7a14340a10d8c85
font_01_sfnt_off000057c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57C8 10092 bytes
SHA-256: eac92b3f72f128c6ccc431be0247c8b6d9602fa54b12ffe1a7cb90c101cd971f

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