Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9112064b55a17d1…

MALICIOUS

PDF

37.2 KB Created: 2020-11-04 04:13:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a4f76006c9f3c29e586aba2cc5bc0b86 SHA-1: 33e8d4663b0a3cc11184cfab9925c52c4d49aa70 SHA-256: a9112064b55a17d18e8bd5f2604dd5a945e40ce2bed1e046c5276c1215dba0a6
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'https://ttraff.club/123?keyword=1+west+madison+phoenix+az'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content.

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://ttraff.club/123?keyword=1+west+madison+phoenix+az In PDF document text
    • https://rukinedofixod.weebly.com/uploads/1/3/4/3/134348838/liluwalibogobigobefi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418566/normal_5f9918095a90c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379744/normal_5f8e36b2504d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371269/normal_5f9057e815e32.pdfIn PDF document text
    • https://biduvokiket.weebly.com/uploads/1/3/4/3/134367510/164317936600.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391899/normal_5f94727555d24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424645/normal_5f972c1955dcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381752/normal_5f9fafdde7477.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372707/normal_5f907aa81144a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4adb03f0-bcec-42eb-bf3e-cb8cef90d43c/97826445399.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/zetagupijedanabev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e6c7449-bbaa-4af4-9e15-a58f29ddeb29/vupiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3f6de1a-67e9-4a25-be5e-f8c2af66853d/new_holland_ls160_service_manual_fre.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_off00005074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5074 5236 bytes
SHA-256: 1ad756f83c141774340ca52c7251c000d93c3f32e376bcc527037d58939cf292
font_01_sfnt_off0000623e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x623E 11232 bytes
SHA-256: 1f834771b779da1f11e6b314a109a5e28988e6e8df18b8f163a826a99f4d335b