Malicious PDF — malware analysis report

Static analysis result for SHA-256 746340d133d73a4c…

MALICIOUS

PDF

40.2 KB Created: 2020-11-03 21:00:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d1b2e01e63377a4bbb32ba212e3e3ddf SHA-1: 6b85a940c501b9932e91b22200379444678bfbf9 SHA-256: 746340d133d73a4cbed8ecea80d5db88aa265335027ef5740af9323381e58bb6
174 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file contains heuristics indicating it is a malicious redirector, uses social engineering lures to trick users into enabling content or installing updates, and impersonates cloud document services. The embedded URL https://ttraff.cc/123?keyword=google+drive+venom+2 is flagged as a known malicious redirector, likely serving as the initial stage for downloading a secondary payload. The document body, though heavily obfuscated, contains this URL, reinforcing its role in the attack chain.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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.cc/123?keyword=google+drive+venom+2 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408346/normal_5f9dddcfde8c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371812/normal_5f9621588501f.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/kavitokolezub/bengali_news_paper_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/lufanepuvuxal.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/active_voice_and_passive_voice_question.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/ctam_mark_award.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/494c2e24-a439-4fd1-8362-a54d4f0b0331/kumon_math_level_e_answer_book.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/94431269250.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe3bee37-ad4d-46b1-95e5-266349425dcf/gopudibipukolunal.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/town_of_salem_invest_results_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/sofewajuzunori.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_off00006149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6149 4980 bytes
SHA-256: e04400eb884928d4a0e8c5697447fef95ae94b9c70baa08f7803c3f7173ea663
font_01_sfnt_off0000722f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x722F 10116 bytes
SHA-256: d729663d190819dcda956037804f528d3234693fb05d46d43911a4e38e8ebbae

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