Malicious PDF — malware analysis report

Static analysis result for SHA-256 dafe3cf4d6f18498…

MALICIOUS

PDF

56.5 KB Created: 2020-10-30 14:57:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bde8a29c2fd96c2d05a4b48555020f09 SHA-1: d9b16da25e9515215ca5a5094615dc2cd06570f7 SHA-256: dafe3cf4d6f184981a4aea7cf7d9da6b2ad6392ceb4080d8aa0fd96891cd86cc
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • 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=jamie+lee+curtis+dan+aykroyd+trading+places In PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/winin.pdfIn PDF document text
    • https://zevigetadafuwun.weebly.com/uploads/1/3/0/9/130969942/8df81.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/ebb3635b0dac4c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387233/normal_5f92e52f17351.pdfIn PDF document text
    • https://rigitugatelimo.weebly.com/uploads/1/3/4/1/134131632/8283179.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374859/normal_5f89ed4c02479.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410016/normal_5f99a3932aec3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f87082e7471a.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/22ca507bf0.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
    • https://s3.amazonaws.com/gadumagabusodel/elton_john_tacoma_dome_setlist.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/bombastic_words_for_love.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/juxebuneroligidodobudo.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/o_reilly_books_javascript.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_off00009095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9095 5432 bytes
SHA-256: 627ab87a604d48564793897df37b8512399d95a993b9529139f94d22e8ce92d3
font_01_sfnt_off0000a2f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2F9 10460 bytes
SHA-256: def0fd0a287c272f72bd40cc8de3225a0845203a70877f137ceab1bfba5ff384
font_02_sfnt_off0000c6cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6CC 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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