Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ebd6bd3cb483e92…

MALICIOUS

PDF

46.7 KB Created: 2020-10-31 05:57:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d39e2da145bfb37186fc583a94426839 SHA-1: 1dd6b1f32529e2ab02f02d3890c78974a09d4d2b SHA-256: 5ebd6bd3cb483e92b68ff36e461e7eded9f14f51be2448a90a52bf3b2d106fcc
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, https://ggtraff.ru/aws?keyword=pwn+the+sat+math+guide, disguised as a study guide. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs further supports its malicious intent. No scripts were extracted from this sample.

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://ggtraff.ru/aws?keyword=pwn+the+sat+math+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369149/normal_5f89846fd5ccd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369927/normal_5f9a9764da4d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375083/normal_5f91282e07497.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408995/normal_5f9cbd54c6194.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/zuxadol/analog_and_digital_electronics_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2379546d-55c5-4752-8855-d36f5df6b84e/fujudedawirot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd507fda-82a1-4b93-be68-d21fb9901c63/kusetegefag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e03eb771-6839-4354-87bc-d444e09b5595/10914355183.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/acids_bases_and_ph.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7753674-f2ae-49fe-ac8e-9d7bf4b86bbd/47190618013.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31b8a4ff-93a2-431e-b1a6-3b5801db127f/kejirenut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/514ac273-529b-459e-8d5d-9a2a43203658/zuzajenolanuvoje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/019aa0e8-c31c-480f-a73e-904101637b82/kudododokibudomuzonuji.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_off000076f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76F0 5204 bytes
SHA-256: 60a9e9f0345f93c5a00d45f7dbaaa6ba9dec8356d73e929787d2b5c4828622fc
font_01_sfnt_off00008892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8892 10980 bytes
SHA-256: aaf71bcb9f77ff025979796bf99193b24a6e5757e0722c578316b7983737c1e4