Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8e10b6e690c80fc…

MALICIOUS

PDF

182.9 KB Created: 2020-10-22 00:30:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 348788dea3e6986464671a967360a65d SHA-1: 877c78623d3fa24e9b387d23db3db16012ea88f5 SHA-256: a8e10b6e690c80fc4c35c3bb85d561de0cc87bb8f2a542a1c16c3a316dd62374
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, 'https://ttraff.cc/123?keyword=geometria+euclidiana+plana+jo%25C3%25A3o+lucas+pdf', is the primary indicator of malicious intent. While no scripts were explicitly extracted, the PDF structure and the malicious URL suggest an attempt to lure the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • 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.
  • 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.cc/123?keyword=geometria+euclidiana+plana+jo%25C3%25A3o+lucas+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5f898527e61ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374189/normal_5f900bc08c0b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370987/normal_5f888f5fca55e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367273/normal_5f878f3f5f56b.pdfIn PDF document text
    • https://kafasomawupi.weebly.com/uploads/1/3/0/7/130775431/62b2b46b9260df.pdfIn PDF document text
    • https://jugoruzaja.weebly.com/uploads/1/3/1/4/131407370/8788211.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/c6430d.pdfIn PDF document text
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/9ecc6771f91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369638/normal_5f8881496822b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373778/normal_5f8f6f6d022bf.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/1/0266/8937/2329/files/xeruxenege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cccbd70-391d-48a5-8168-644b55e23ecf/47262384197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/737836ac-9e43-479a-83d7-ce03167543dc/88746852586.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1706c5b8-cc68-4113-9350-d6ed9af1b467/fortune_smiles_upon_the_bold.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f66a159-0bce-41ea-8740-3b1d3a44e493/37889665630.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20d49bfa-b8d5-43a9-a8a4-51d4e3e3eb5c/rusajasutumizufasub.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000262f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x262F5 5724 bytes
SHA-256: 9e1536e9f43b726d334c1548d13e62e1c914c6abf098543b8f8118fe95b89355
font_01_sfnt_off000275be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x275BE 2348 bytes
SHA-256: 392770d4f411cdafe82f972e26ba7fded505f0903cf7a37a104b0a5b985a3f16
font_02_sfnt_off00027f82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27F82 18192 bytes
SHA-256: 401f9917067aa69c7d6cb9eb54d291d24328d094d6d60f6e68fc20b26307563b
font_03_sfnt_off0002b49a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B49A 16424 bytes
SHA-256: e0a94056d2e4ca2350510def2b6fbf93c8dedd5897ce353183ebe767e250ff4f

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