Malicious PDF — malware analysis report

Static analysis result for SHA-256 cddd33f8282bddd9…

MALICIOUS

PDF

36.2 KB Created: 2020-11-04 20:08:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: dc541c9dc02e86140131bae9df2eef7b SHA-1: e4b41c8255980aa2ee4a8b7860f57fbd37818989 SHA-256: cddd33f8282bddd954e60994c2d68bb418eadfcc5f2be6fef37a4711a601edbf
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link farm and a specific redirector URL, indicating a phishing or scam attempt. The embedded URLs suggest the document is designed to redirect users to potentially malicious content, likely for SEO manipulation or to host further malicious content. No scripts were extracted, but the presence of numerous external links points to a content-based lure.

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=blood+pressure+machine+with+small+cuff In PDF document text
    • https://cdn-cms.f-static.net/uploads/4386591/normal_5f982e846fe83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413705/normal_5f9c425f7e9f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f87141184b32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383916/normal_5f96003b3e4e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369793/normal_5f8bb4459c503.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414152/normal_5f9b34ae0026c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374954/normal_5f92997ceee73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368221/normal_5f96666f74150.pdfIn PDF document text
    • https://kupugaxome.weebly.com/uploads/1/3/0/9/130969415/3582242.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413013/normal_5f94be6835881.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413108/normal_5fa2abe1cf65b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443329/normal_5f9db2482e8bc.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/7b6b18d4bbc2d.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/genedesowul/45171887167.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_off00004ed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4ED9 5536 bytes
SHA-256: caa1150a6b7a5ff78df86c31aae73bdbae09f06d1b75ecd1038dde56e6722a76
font_01_sfnt_off00006199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6199 10016 bytes
SHA-256: 8cc72f9c2a213b3784e42153c9c6bbceb1d7f53ea350f2f5361db2d419f92990

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