Malicious PDF — malware analysis report

Static analysis result for SHA-256 200e104fd74f001e…

MALICIOUS

PDF

45.0 KB Created: 2020-10-06 09:02:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2fd91bb8cd5a02a64161510bcf341c56 SHA-1: dca6f9cbb41583baba73fdf00387b2d34461a240 SHA-256: 200e104fd74f001eeb4235ec506d2b2002915d115cfee8f26939ad92fd1e3af7
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, identified as a link farm, directing users to external PDF files. One critical heuristic indicates a link to known malicious redirector infrastructure, specifically 'https://gettraff.ru/pify?keyword=aluminium+design+manual+2005'. The ML classifier also strongly flagged this PDF as malicious. The document's purpose appears to be SEO manipulation or distributing further malicious content through these links.

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://gettraff.ru/pify?keyword=aluminium+design+manual+2005 In PDF document text
    • https://site-1036652.mozfiles.com/files/1036652/tubibamerojorux.pdfIn PDF document text
    • https://site-1040050.mozfiles.com/files/1040050/91925803327.pdfIn PDF document text
    • https://site-1036832.mozfiles.com/files/1036832/65115446517.pdfIn PDF document text
    • https://site-1039707.mozfiles.com/files/1039707/2819838574.pdfIn PDF document text
    • http://nubuz.desertblossomshop.com/uploads/1/3/2/3/132302842/mugotatekegored.pdfIn PDF document text
    • http://sefizuv.ciarafreeman.com/uploads/1/3/1/6/131606490/1547472.pdfIn PDF document text
    • http://files.clubpayson.org/uploads/1/3/1/0/131070561/53c422b56.pdfIn PDF document text
    • http://remowura.deepdrillinginsights.com/uploads/1/3/2/8/132816036/866909.pdfIn PDF document text
    • http://files.erp-selection.org/uploads/1/3/1/3/131379546/ea2ad1011c2a.pdfIn PDF document text
    • http://files.orlandobathrooms.net/uploads/1/3/2/6/132696580/jikojalife.pdfIn PDF document text
    • http://files.carousel-kids.com/uploads/1/3/0/8/130813988/burepudijepema_nogaxubeg_bujusafesu.pdfIn PDF document text
    • http://files.noticiasinternacionales.net/uploads/1/3/1/6/131637109/9749964.pdfIn PDF document text
    • http://files.scottishstevennyc.com/uploads/1/3/0/9/130969553/81012b94fff29.pdfIn PDF document text
    • http://files.ocpandb.org/uploads/1/3/0/7/130776254/fiwitanagekoferimofa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7985/1414/files/94849798946.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2199/4648/files/drift_games_unblocked_at_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0458/2594/9859/files/red_cup_cafe_chesterton.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_off0000708a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x708A 5436 bytes
SHA-256: 7ade33c26a7b0d88b28df73426be5e36367368e3e7e3edc0cd278493c7ac6e7d
font_01_sfnt_off000082f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82F8 10688 bytes
SHA-256: 0707d3abfb6f0aeae6191c2052084f901ccfc9bf0f0070c8ab94a444e6b53dbf

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