Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aed0f806da11595…

MALICIOUS

PDF

35.2 KB Created: 2020-11-03 20:44:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 079fa5fcbc7a4eab76dba7b81980714e SHA-1: 3fff4a30293197ac0b20b99ea249c02015864f6a SHA-256: 6aed0f806da115959bfc6507a3b66054045d50841b415095f8b229dfa9d14e95
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 URLs, with a critical heuristic firing for a malicious redirector link to 'https://gettraff.ru/aws?keyword=words+that+start+with+tomb'. Another critical heuristic identified a PDF link farm, with the first URL pointing to 'https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/8514484.pdf'. The ML classifier also strongly indicated maliciousness. These findings suggest the document's primary purpose is to redirect users to potentially harmful websites, possibly for phishing or SEO manipulation.

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://gettraff.ru/aws?keyword=words+that+start+with+tomb In PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/8514484.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368767/normal_5f87f67c2d7bd.pdfIn PDF document text
    • https://muvitaburire.weebly.com/uploads/1/3/4/4/134441723/zawarewiluromu.pdfIn PDF document text
    • https://sanuvexugivi.weebly.com/uploads/1/3/1/6/131606490/bb445a256.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420449/normal_5fa05e3e53104.pdfIn PDF document text
    • https://dubuzosokiboxof.weebly.com/uploads/1/3/1/1/131163723/jigog-puvewulib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f87064893f9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388162/normal_5f97b73b01110.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366633/normal_5f8f3a10ae9ca.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/susonanezaj/pdf_page_splitter_free_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a20cba58-47e7-47db-b6e0-4562e140b79c/pudakixifonelajize.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf58dc3e-73af-450f-9ded-7e56ef816b87/xajutat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ac38dd7-d9bd-4965-842d-a43de324eed2/operations_management.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_off00004bf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BF4 5280 bytes
SHA-256: 507ff7bf4541c53ece206cd902e42ef567953bdd144a59285b25fa0e2e82b5f2
font_01_sfnt_off00005dd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD0 10092 bytes
SHA-256: c930e71292ec3644efa3f433e9ec3bd66bcda6e5f86c15d77fa210f6a754ca66

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