Malicious PDF — malware analysis report

Static analysis result for SHA-256 c37aa45b9d31789b…

MALICIOUS

PDF

41.2 KB Created: 2020-11-04 07:52:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ca64bd6cdf7cd6dace245ca483c71a08 SHA-1: 9d1ed935149b465dc7690929af6ca92076137a9d SHA-256: c37aa45b9d31789b753ceacf9975fc565a3ec1011ee723e6145c9b086519c062
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://ttraff.cc/123?keyword=manual+citrus+press+juicer In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371505/normal_5f8a681051f55.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/b31bc455.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366628/normal_5f9da2693b3b0.pdfIn PDF document text
    • https://puliwavigajog.weebly.com/uploads/1/3/4/4/134469254/xajegukigifojowad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403283/normal_5f91d9f669117.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408863/normal_5f98b3096992b.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/a7b88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366381/normal_5f8742bd101f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405687/normal_5f937e0b9d502.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/rove_pest_control_st_paul.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_off0000643d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x643D 5008 bytes
SHA-256: a72751b46767802598abd1c62ecc280548a5683fb2a422dbb5210e5c4fd1dda5
font_01_sfnt_off00007564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7564 10324 bytes
SHA-256: ab9dba8761a965fa057510922e725f896d315ce0f8ff0a5a45d206d8e728c4e7

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