Malicious PDF — malware analysis report

Static analysis result for SHA-256 0952fd9988a95c6a…

MALICIOUS

PDF

40.9 KB Created: 2020-10-31 17:53:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: bfd9a4224ea139fbec2da80349589ddf SHA-1: e707e6b7cf4c2114153595169fc71df63667ffd2 SHA-256: 0952fd9988a95c6afecdbfc720ec3109b7a3111e4c5fc3ddc95b9f6748fd3b91
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, many of which point to external PDF files, suggesting a link farm or SEO spamming attempt. One prominent URL, 'https://ttraff.club/123?keyword=deinosuchus+the+isle', is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malicious redirection attempt, likely delivered as an attachment.

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.club/123?keyword=deinosuchus+the+isle In PDF document text
    • https://cdn-cms.f-static.net/uploads/4419002/normal_5f9bfeab70b33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377704/normal_5f8dbc3aeaa35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369777/normal_5f99f70549dcb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0200/2595/files/lubeba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/9438/1989/files/convert_word_document_to_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/canon_mf3010_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/0776/8251/files/telling_the_time_year_2_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/radebanawinuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1006/4036/files/compression_i_love.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/todagofufulivaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83bd9ecb-98b7-48a4-a20c-8fdc26161a49/saminekowenejilo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98e45a16-dcd6-47db-8e2d-5335c3bd8414/futbol_antrenman_programC4B1_C3B6rneC49Fi.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/tewowi.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_off000064a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A9 4580 bytes
SHA-256: 0f73989f12b846c2e2ad361faec960881f4321aabf7f2de313834ec87156dc8f
font_01_sfnt_off00007445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7445 10100 bytes
SHA-256: 6f67cf5f216519f24db80a71b73bd80818dbdd6408f1929c8337f2e3d8a12a9b

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