Malicious PDF — malware analysis report

Static analysis result for SHA-256 b909b3b26e9b248b…

MALICIOUS

PDF

76.7 KB Created: 2020-10-12 04:02:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b000a831301db951dccf23c04c7702df SHA-1: f3068c771b249cedc9f706c6af19660aa6c0fd70 SHA-256: b909b3b26e9b248b32c461fbf4f6b125462481af48a3eaa474ff7c5a4bc39dbb
124 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains a URL that is also present in the list of extracted URLs. This suggests the primary purpose of the file is to redirect users to malicious sites, likely for further exploitation or phishing.

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 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://ttraff.club/pify?keyword=art+of+war+pdf+summary In PDF document text
    • http://fopuf.katahdinbelgians.com/uploads/1/3/0/8/130814328/pasuwipote_kigezemevudojur.pdfIn PDF document text
    • http://files.blacktomatoesinc.com/uploads/1/3/1/4/131453247/jemasimuzurepuv.pdfIn PDF document text
    • http://wedefo.bagaducechorale.org/uploads/1/3/1/4/131454436/9dfef95.pdfIn PDF document text
    • http://files.roygrayphotography.co.uk/uploads/1/3/1/0/131071067/peloji.pdfIn PDF document text
    • https://site-1038608.mozfiles.com/files/1038608/bebumalagifidexose.pdfIn PDF document text
    • https://site-1043051.mozfiles.com/files/1043051/24961299834.pdfIn PDF document text
    • https://site-1038634.mozfiles.com/files/1038634/vukimaditawutedozemo.pdfIn PDF document text
    • https://site-1036902.mozfiles.com/files/1036902/85197657710.pdfIn PDF document text
    • http://files.whiteschapelumc.com/uploads/1/3/1/3/131383665/buxefub.pdfIn PDF document text
    • http://files.kristenkuiper.com/uploads/1/3/1/3/131379183/likikawevidud-batugofe.pdfIn PDF document text
    • http://files.kodelcius.com/uploads/1/3/0/7/130740054/87d2c54.pdfIn PDF document text
    • http://daxufajo.mahoganydrug.com/uploads/1/3/2/6/132680869/4873308.pdfIn PDF document text
    • http://gikiv.bendacappellafestival.com/uploads/1/3/0/9/130969505/fogatipofiwogokozep.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/e5d06897-d8b0-4ab7-9d86-f541d43a2b21/56595230500.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb50f7b9-b75f-41b7-9da8-608e2377faca/boreju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02abc69d-e5e1-4383-ad40-50e17a1c13d2/vaxumuralegajemipe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB119 18536 bytes
SHA-256: c83b450b0accde8fa80b0058c7a9809316b36f9d5fbccf791d27d0ad17848845
font_01_sfnt_off0000eb30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB30 5336 bytes
SHA-256: 0b2cd1b778215ebadd1fc8eda02bded02177efd7e617b3975ae3a0d7ff2466f9
font_02_sfnt_off0000fd54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD54 12748 bytes
SHA-256: e095ccf2bc72a3887a01cac3902d81b5f96e84384ac4a24a9ee49df6b3a537f0

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