Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c35bf4430c0fe26…

MALICIOUS

PDF

46.5 KB Created: 2020-10-08 19:55:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 43beb27b072f01f2f7845ac209bf08c2 SHA-1: f5da4228dff2caf2227236029bf1aeb3b647439e SHA-256: 1c35bf4430c0fe26c3148c868be0334609b53f4c99b4e9e0bcd033d7743d3688
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The document structure and link distribution suggest it functions as a link farm on disposable hosting, aiming to funnel users to potentially malicious or phishing content. No scripts were extracted, but the high ML confidence and critical heuristic firing indicate malicious intent.

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://gettraff.ru/pify?keyword=rhizome+food+storage+in+plants In PDF document text
    • http://files.planovationsmedia.com/uploads/1/3/2/6/132680896/76e648bfe2f8.pdfIn PDF document text
    • http://files.tristategrp.com/uploads/1/3/1/4/131437978/6205656.pdfIn PDF document text
    • http://files.globalinguae.com/uploads/1/3/1/4/131482997/xuzuvukaw-favuvubafa.pdfIn PDF document text
    • http://garopij.rickyfrank.com/uploads/1/3/1/4/131438282/vemuw.pdfIn PDF document text
    • http://lugas.shelbystangatreasures.com/uploads/1/3/0/8/130873947/bekusagunejup.pdfIn PDF document text
    • https://site-1036929.mozfiles.com/files/1036929/lazoposinijedozebipasaget.pdfIn PDF document text
    • https://site-1043662.mozfiles.com/files/1043662/pinimenof.pdfIn PDF document text
    • https://site-1042988.mozfiles.com/files/1042988/44785748635.pdfIn PDF document text
    • http://wuzojod.luckylifebymeg.com/uploads/1/3/0/7/130738755/gizepevesukufe-pevirogo-nawifaji-sovox.pdfIn PDF document text
    • http://files.buzzboxguitars.com/uploads/1/3/2/3/132303012/zivofesepad-xorijumuwasusit.pdfIn PDF document text
    • https://site-1044239.mozfiles.com/files/1044239/18083031641.pdfIn PDF document text
    • https://site-1038514.mozfiles.com/files/1038514/83269408881.pdfIn PDF document text
    • https://site-1039577.mozfiles.com/files/1039577/jeporilikasepusi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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_off000062ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62ED 5300 bytes
SHA-256: 3d3680b0b75ced864be8910468396dbdf4ddd0cd8f3a356d8110da458538db32
font_01_sfnt_off000074d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74D4 13304 bytes
SHA-256: 18651ad14c924c1e3eb50f5d279ee0fa260a47c8a6f5f44cdb6bed58d0f3d1be
font_02_sfnt_off00009f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F2E 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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