Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9ddf9c584bc6e85…

MALICIOUS

PDF

47.7 KB Created: 2020-10-29 23:57:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: cb1bf105ceb1fe9840606ad18a7d4e84 SHA-1: d190671764d0ec1bc2ced828ff414e5ac28de92a SHA-256: d9ddf9c584bc6e8551a4ef648c27bfff849534de3dd4b9b03c106d81df55f419
94 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, which is likely intended to lead the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains the target URL, suggesting a social engineering attempt to trick the user into clicking the link. The ML classifier also strongly indicated maliciousness.

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://gettraff.ru/aws?keyword=elastic+collision+lab+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371244/normal_5f9416d39dae0.pdfIn PDF document text
    • https://nevonanopovew.weebly.com/uploads/1/3/4/3/134335048/1a7139.pdfIn PDF document text
    • https://dedotomonifagax.weebly.com/uploads/1/3/1/6/131606429/dulina-wewupebefudadu-fipikenuwawite-mekelajugomaki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377662/normal_5f8a18b741beb.pdfIn PDF document text
    • https://ravidaxixow.weebly.com/uploads/1/3/4/3/134315840/9415529.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383146/normal_5f8eea528621c.pdfIn PDF document text
    • https://papokerudinex.weebly.com/uploads/1/3/4/3/134310480/ec86391bb562e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379476/normal_5f8d94af73ef7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367017/normal_5f8c82523eda2.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/tetofamuxulil/accounting_equation_explained.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1aed559-1258-42f7-80c0-62b1a1ba6752/leyes_de_los_productos_notables.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_off00007b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B22 4980 bytes
SHA-256: 578c35ff262dd1891854a91a643bc71e73c01e9a3edafac2ae65643c0065640b
font_01_sfnt_off00008c32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C32 11224 bytes
SHA-256: 756464bc1fa4c3bebc7964f25df8431deb37931cd8ec50b651ee36770688b695