Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e453f2863345e7…

MALICIOUS

PDF

54.0 KB Created: 2020-10-28 21:47:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 689fe5b5b5d40bd86e0c203f64ba8e02 SHA-1: 302b360dd8167b2845775faad1d78d4677a59153 SHA-256: d7e453f2863345e75f4007a5f114597ebd2c417cec21ba0c6da31a441993a46c
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically `https://cctraff.ru/strik?keyword=disneyland+height+requirements+strict`. Additionally, it hosts a large number of external PDF links, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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://cctraff.ru/strik?keyword=disneyland+height+requirements+strict In PDF document text
    • https://suzaruluzi.weebly.com/uploads/1/3/4/4/134455671/1614561.pdfIn PDF document text
    • https://xikewewojan.weebly.com/uploads/1/3/4/0/134095915/loruseluti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5f889b5f999eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382781/normal_5f96cd50469f7.pdfIn PDF document text
    • https://dufavepuxafolim.weebly.com/uploads/1/3/4/2/134266173/6ddd312fcf352c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382638/normal_5f8f94cb90a38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384469/normal_5f918bc31a902.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369168/normal_5f88c1a8c6226.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366627/normal_5f88900f29a30.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/1/0499/3295/9898/files/51222260702.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/905d2ecc-806e-446a-b690-4a35f87879bc/12392175708.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6310/7480/files/photo_editor_apk_free_download_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4484/8295/files/41879381634.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9536/8888/files/taschenrechner_app_android_ohne_werbung.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5002/7176/files/uruk_hai_scouts_painting_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/8339/1910/files/17842500744.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/8794/5622/files/67116084964.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3272/2599/files/48663055816.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/281809dd-79b6-4f3b-99fd-4a46a090e32b/19867236545.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cfc414f-6ef0-4817-ba62-6128a8add0b3/72455541232.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8827/1767/files/transfusin_de_sangre.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfd97a46-def4-4cd2-b753-2c240a6d268d/kapexizisox.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_off00009348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9348 5580 bytes
SHA-256: c291bee8b4826bd279f554aaa6a65dc5d8c1f66ffa121a8ba1ad4e874fb7188a
font_01_sfnt_off0000a617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA617 10652 bytes
SHA-256: 5acbd7125666b3ea0426a8249a2620eaea1981e986fcbdc63a7281d4d38d2b91

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