Malicious PDF — malware analysis report

Static analysis result for SHA-256 041340433e2d57df…

MALICIOUS

PDF

44.4 KB Created: 2020-11-08 11:58:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3352e517f976bc7c2edfcca7108202f SHA-1: d52b95ae68012fa1557fdf229fc2b8f575fa4441 SHA-256: 041340433e2d57df77f704087c1f7cc7adadc4ac089717d2a5eb983cae9176c0
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of a malicious URL in a PDF is a strong indicator of a phishing attempt.

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=sight+and+sound+theatre+donation+request
    • https://cdn-cms.f-static.net/uploads/4369907/normal_5f9728f5cda07.pdf
    • https://cdn-cms.f-static.net/uploads/4379377/normal_5f8dadb026f38.pdf
    • https://cdn-cms.f-static.net/uploads/4372072/normal_5f8a0f325ad41.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/aab7e29d-c317-4b71-b794-c522425908b9/sams_choice_ham_cooking_instructions.pdf
    • https://uploads.strikinglycdn.com/files/5174e823-140e-47c4-a564-334169c07301/lobafopenegebupejumivi.pdf
    • https://s3.amazonaws.com/falufusu/napewowagolulidibozu.pdf
    • https://s3.amazonaws.com/jeponowon/bowedunedababuzupuf.pdf
    • https://s3.amazonaws.com/mijedusovineti/22263805454.pdf
    • https://uploads.strikinglycdn.com/files/7ec0dbf8-7a15-4e69-8e41-e7e0cf6ef83e/portal_asesores_seguros_monterrey_new_york_life.pdf
    • https://s3.amazonaws.com/wumodukubaru/vepatibidisezelegi.pdf
    • https://uploads.strikinglycdn.com/files/7fff1416-67e7-4d46-aadb-255a31e601ba/30893608128.pdf
    • https://uploads.strikinglycdn.com/files/c80b791b-35ec-4cda-806e-7d8faf3730ea/66009670502.pdf
    • https://s3.amazonaws.com/dinisemowoge/legajum.pdf
    • https://uploads.strikinglycdn.com/files/fed59d7e-993c-4624-878d-87833542dc37/milapinibozux.pdf
    • https://uploads.strikinglycdn.com/files/89437be3-bb0d-446d-b456-5a93bf939c18/80177569374.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b65.bin
d1c0ef4b1a7d6bac3f783f8b08364e5ba122b7f7d71ce30605cb2114e876b7ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B65 5284 bytes
font_01_sfnt_off00007d4d.bin
19d7e458b00909467c73f1edf24e201a96e1f4c980df885dd211fc3059ae3604
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4D 11372 bytes