Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7057e6b5a289ce2…

MALICIOUS

PDF

43.3 KB Created: 2020-11-04 02:48:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c3e784e38048b62d3e8b762789a08393 SHA-1: 2c8ecedc8c38a53c68410b92fcd4d7994c3d744a SHA-256: d7057e6b5a289ce23c0f04ce228e63e19440b19a12f8e41b0536281dda8109b1
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://cctraff.ru/aws?keyword=sweet+spicy+cherry+pepper+poppers, which is a strong indicator of malicious intent. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, appears to contain the malicious URL and other URLs that may be part of a download chain.

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://cctraff.ru/aws?keyword=sweet+spicy+cherry+pepper+poppers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368951/normal_5f89e196144fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415327/normal_5fa19a440d834.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425483/normal_5f9f08c572be7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375073/normal_5f8e36faf353d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369901/normal_5f915d5e59dcf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/033d5626-092d-451e-bc72-84ffc5fff1c1/weed_blow_torch_lowes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4a28b97-e553-44d8-a77f-dc3ed60d3a32/88602544383.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80d6d546-2746-456c-be8f-e45a5237a6ab/35979123878.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/11020880142.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D18 4760 bytes
SHA-256: 541d0bf98c4dcf7c32f5c0e22041fb085566125ed02b58ea157a7e96385e6c82
font_01_sfnt_off00006d6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6D 10888 bytes
SHA-256: 8ae27decdc1c32c8f3289b66916190c1b397b528de71d3d85c6df3cf322c0d8a
font_02_sfnt_off000092b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92B0 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378