Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe17c0f595398f8…

MALICIOUS

PDF

52.0 KB Created: 2020-11-02 21:36:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d7881cf424425fc58d3a596c373f2a1d SHA-1: b7b9e0e0c08cfac68cff845d2be7714f622982d5 SHA-256: abe17c0f595398f8ac75478db02ed9f2e95efa8eb8bb478cfb411631b9871ce7
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 large number of embedded links, many of which point to external PDF files hosted on various platforms, suggesting a link farm or SEO poisoning tactic. One prominent link, 'https://ggtraff.ru/aws?keyword=naming+inorganic+compounds+worksheet', is identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same lure text and URLs found in the heuristics, reinforcing the malicious intent to redirect users to potentially harmful content.

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://ggtraff.ru/aws?keyword=naming+inorganic+compounds+worksheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369646/normal_5f917cccde17f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369305/normal_5f87dfcba20cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385424/normal_5f9703bb86163.pdfIn PDF document text
    • https://wajatajosow.weebly.com/uploads/1/3/4/4/134487766/femesupug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375694/normal_5f8b5433e9d25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370072/normal_5f99db1543314.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f8ff90405dfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370055/normal_5f9611348faf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368506/normal_5f8ca73baeb9c.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/c23478e9-c470-494b-8227-5dc8d336047f/53280020401.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_off00008a78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A78 5580 bytes
SHA-256: 18799f1f589173958c06dfb6e100ef31f821feabd2c522d72e22744fb65ab8e2
font_01_sfnt_off00009d60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D60 11352 bytes
SHA-256: 6f99bc80e8fedf18e9123fc09027664cc6361c6367446ea66c21a35a0b3f8ccf

Open this report in the interactive analyzer, or submit your own file for analysis.