Malicious PDF — malware analysis report

Static analysis result for SHA-256 d37054ca4dbbcc8d…

MALICIOUS

PDF

58.7 KB Created: 2020-10-30 22:20:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0baae8768b1e7bd83988443a38228884 SHA-1: 14a3eb1a828a2bc11335ff1fbf6b8a3f71eca671 SHA-256: d37054ca4dbbcc8d7f362d9955f9bfebe5959b7272814463f69617f20b0ed779
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL `https://cctraff.ru/aws?keyword=mmpi+2+questions+download` is directly associated with this finding. While no scripts were extracted, the presence of a malicious redirector strongly suggests an attempt to deliver a payload or phish credentials. The ML classifier also flagged this PDF with high confidence.

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=mmpi+2+questions+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388814/normal_5f9a55a68c7b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388627/normal_5f8ef4cd3a77c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374024/normal_5f96cb310cfb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388420/normal_5f95997848524.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371524/normal_5f8b3fccb03c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416935/normal_5f97d651a04ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366045/normal_5f883f7181a86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375698/normal_5f8f97f83e49a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384839/normal_5f99162645e2f.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/lulelepese/61257556685.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/pdf_to_word_software_converter_free_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_off0000aa9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA9D 5364 bytes
SHA-256: d61ab7d27a8ed9dd680b02d4cbbdbc037bd5ee1c9e9e8b0a08b851a86ad6a488
font_01_sfnt_off0000bce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCE8 9836 bytes
SHA-256: 69501b3527ee2d47c4a73af6115cd39429736b9ffd4fe93721bb072d41501f32