Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8d47aec7ce00b52…

MALICIOUS

PDF

39.4 KB Created: 2020-11-06 15:21:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1f4d2b46a9c7d0f9006954e463dd9f3f SHA-1: cf47c788558b0a39188a415edab52d6b9a54a990 SHA-256: c8d47aec7ce00b52766ea151fff508fdbca72f6bc5971c4a8e3446b4fce941ae
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://traffking.ru/aws?keyword=division+de+fracciones+con+mismo+denominador'. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lure the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://traffking.ru/aws?keyword=division+de+fracciones+con+mismo+denominador In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f871bf4aae16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419640/normal_5f96e8ca397b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393020/normal_5fa255ed83d70.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/63469583-3dfe-4231-817f-aef5eba41387/real_estate_study_guide_california.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4ef76d5-7830-441d-bea0-de538840c1c3/vanity_of_human_wishes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e355fd6-c4a7-4fc7-b759-1e303c33ed9e/94455808785.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a913b649-99f2-4119-a614-c7a4deaecd60/96244220229.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89989afd-1dc3-430c-a9fd-22a29d35ed41/52028675166.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b916dda1-b0ba-4256-9c00-a08a1db94eb8/12171985177.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4617c9ca-eef3-4072-abfd-441b0d238212/vodoxofofefumadamuselorum.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/epigenetics_lyle_armstrong_download.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_off000059f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59F0 5196 bytes
SHA-256: 02ce674225e8dab913766badc9e004485d0c0ab538812ef57f39bff6b547d769
font_01_sfnt_off00006b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B95 10928 bytes
SHA-256: 860ab3bc98d87b025820b29a6a7af205a54b6621e8da0f43b4da5ff3676f37eb