Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c4e04233bb66f90…

MALICIOUS

PDF

41.5 KB Created: 2020-10-28 07:42:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 4f57f99f7206b9e260ee8159f8544a75 SHA-1: 9abe1bea16bdd389bf0781f3524861d919a29320 SHA-256: 2c4e04233bb66f909e2f945158db1a0a55bdbf58ac52380ca9177c7cc2dc6c51
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, also contains URLs pointing to external PDF files hosted on various platforms. This indicates a likely attempt to drive traffic to malicious or spam-related websites, potentially 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/123?keyword=agate+rock+value In PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/rimugavo.pdfIn PDF document text
    • https://lupolaluxu.weebly.com/uploads/1/3/2/6/132681144/533ae5baa0f3c.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/3718456.pdfIn PDF document text
    • https://gemenudotipetal.weebly.com/uploads/1/3/2/6/132695720/8820ecd4fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392869/normal_5f98bf9e4872c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382972/normal_5f8bc10cc0e1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371272/normal_5f962af3ec92b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367922/normal_5f9686e20b001.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376088/normal_5f8fd596d0c04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382620/normal_5f91805ae5565.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369519/normal_5f8f4909176a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377935/normal_5f8cf1051e735.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/83908e48-d220-4ecc-9678-944731db0b96/71875287620.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b6619bf-5977-4135-bef7-65c97bd06c27/doredegasipomoferaluxul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ac33840-cfbb-4dfd-9448-0a2f0e973f19/55253200537.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/752057d7-c1d5-4b00-9b5e-dec94f0eb1c3/97000545653.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7afe0643-6fd1-4a89-8e80-300495999b41/gingerbread_man_coloring_sheet_print.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5177c1f2-0298-4cb4-b4d6-4899d13ae7b2/fisher_paykel_refrigerator_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b81b229-a101-44a8-9808-e423acb7a375/vosagabunedemulozajusiko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8c3205f-da3d-4d4d-bd88-b3150b1a5d91/56744332829.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_off00006563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6563 4900 bytes
SHA-256: f9fe92f4bd9ab1f0f28a6f53f9af9c8e5abc9f77d8fca7aae0d22b2afab708dd
font_01_sfnt_off0000762c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x762C 10432 bytes
SHA-256: d5b7aebcdc0466694f6c51916dac2908f748c2ecbb084621a76a02c7dd824323

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