Malicious PDF — malware analysis report

Static analysis result for SHA-256 da4e472f34a0d962…

MALICIOUS

PDF

45.0 KB Created: 2020-11-05 08:40:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 741f6bb92a79496cc58dcc3839fa643f SHA-1: db42e0e952046b28d89cb2de875c1c53a19ff212 SHA-256: da4e472f34a0d9620414f93a4702f413cab1d972bfe261f1fc7a2933ac08e314
162 Risk Score

Malware Insights

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

This PDF file contains a high number of embedded links, many of which point to redirector infrastructure or link farms, indicating a malicious intent to distribute malicious content or lead users to phishing sites. The ML classifier strongly flagged this PDF as malicious, and the presence of urgency language further supports a social engineering attack. The primary malicious URL identified is https://gettraff.ru/aws?keyword=first+day+loan+login, which is likely part of a credential harvesting or scam operation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=first+day+loan+login In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376870/normal_5f89c8f98e35d.pdfIn PDF document text
    • https://liloxowilobo.weebly.com/uploads/1/3/4/2/134265539/8050161.pdfIn PDF document text
    • https://kumusexowefas.weebly.com/uploads/1/3/2/7/132741352/6c33741.pdfIn PDF document text
    • https://nodimawajovuri.weebly.com/uploads/1/3/4/4/134431691/6747601.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/7db20465-e341-4de9-a1ca-5f9a203b142e/64921983810.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ef2a5e7-41cc-4d6a-94b9-06f6fc50768a/essentials_of_understanding_abnormal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/218271ef-dc35-45ff-9c8b-49a945035798/23549057343.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/paul_lynde_halloween_special_amazon_prime.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/27341163474.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec03542f-d0c6-48a6-8af6-2a0e05a97950/vupas.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/the_medical_term_for_indigestion.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_off00006551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6551 4720 bytes
SHA-256: 75569bb93adc15f6477c70323087be2a5b0525153c19ba2dcab3bd8656b59d6a
font_01_sfnt_off00007564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7564 10536 bytes
SHA-256: 06fb89c2a3d24d60bd96e0cb7f3485877ddd6b81ee956919d5f973eccf8c497e
font_02_sfnt_off0000993a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x993A 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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