Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cfc94be6ce0ff65…

MALICIOUS

PDF

42.6 KB Created: 2020-11-05 05:55:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: e8822b692d0f312fbf65582e95ef7c76 SHA-1: 3824de26c73b57658d31fe384a6ea7b7f04eac24 SHA-256: 0cfc94be6ce0ff6530c2ea064812c5ae2cf88afd43557e936600043124cb1889
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/123?keyword=minnesota+warranty+deed+transfer', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other links, suggesting a lure to download a secondary payload. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates a common tactic of instructing users to open a password-protected archive, likely to bypass gateway scanning.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.com/123?keyword=minnesota+warranty+deed+transfer In PDF document text
    • https://mexugagerow.weebly.com/uploads/1/3/4/4/134482965/wefulawarexujabo.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/9653445.pdfIn PDF document text
    • https://dedodewoluxo.weebly.com/uploads/1/3/4/4/134402612/d010d76a.pdfIn PDF document text
    • https://gunewobeje.weebly.com/uploads/1/3/4/1/134109175/wifuderuxejojugibobu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375339/normal_5f957a3a528a5.pdfIn PDF document text
    • https://nenodomamik.weebly.com/uploads/1/3/4/0/134095987/notononetorafu.pdfIn PDF document text
    • https://fimelaxezabu.weebly.com/uploads/1/3/4/6/134622198/musetusabet_naxuxekir_lijudof_xudadiwipel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zokokamu/act_explore_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e72af39-d4fc-4236-8fdd-c0c6437f80cf/xilarelovimelatukilikam.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/pokemon_sun_download_apk_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/caballo_de_troya_11_gratis.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_off000068d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D6 5068 bytes
SHA-256: 065e58da6d189d6703f872504f4b3ec05e1a35a1ba0d81d8698fb522f0c9011a
font_01_sfnt_off00007a47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A47 10484 bytes
SHA-256: 17925912bf597023f9aef31403375e127651b8f71a63fd64442c47199cb81f6c

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