Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa6c3172fdef87f3…

MALICIOUS

PDF

44.0 KB Created: 2020-11-04 08:49:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 09134226ebbac0aad2e46ed638aa7acb SHA-1: 1a72ec3d14781b5a3b7746d1d0ad5894d93bfe40 SHA-256: aa6c3172fdef87f3fad08595ddddc09d89727836b5499bc96ecafc99057928c4
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file 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 3

  • 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.
  • 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://ggtraff.ru/aws?keyword=dat+ten+con+gai+nam+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367296/normal_5f9489fe95a38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369190/normal_5f96861e26ecf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366048/normal_5f8abc2c30516.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371791/normal_5f887708e8064.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/061196cb-1344-4a53-b712-d27830cb9fdb/45395114238.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46d801b3-6803-4571-9092-7f84f4e97426/sulenuborubitifawigagoli.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/12672218461.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/30355148973.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/java_spring_tutorial_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b60548f2-d9e1-496c-89b4-fe8c729bbfcc/6959209191.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/sotutesezafafa.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_off00006e97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E97 5088 bytes
SHA-256: c667efdc8aab83ff404c508680cbd2c7cbd431c36f2b359762f465e88a3bae4a
font_01_sfnt_off00007fe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE5 10536 bytes
SHA-256: cde6cb2aff363edecc7762fe778085b7ea66df4bf3c4748295f6e06e6949d54d

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