Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4d57e19947aa7fc…

MALICIOUS

PDF

42.3 KB Created: 2020-11-01 18:11:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 3a34f0c141bc1b929421077bdb76cb48 SHA-1: 1390148cc1d8c7f0c728a10a5f8443aa7368695f SHA-256: f4d57e19947aa7fc93ce7300acaac4ca3df390758cb31bfc6acbd912551743ab
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 'https://ttraff.club/123?keyword=acid+organic+structure'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious URL within the document body suggests an attempt to lure the user to a harmful site, consistent with phishing or malware delivery.

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=acid+organic+structure In PDF document text
    • https://cdn-cms.f-static.net/uploads/4386349/normal_5f9a5d99d575a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382420/normal_5f9234f19b40e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375075/normal_5f938a589a931.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379231/normal_5f9cc3b501ff7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388412/normal_5f8eb9f81c900.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421623/normal_5f9aecf514d5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413693/normal_5f9b0e08128c6.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/0984d143-a823-497c-95d5-d9a9f09fa110/62976536068.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/ielts_speaking_samples_with_answers_band_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/9581/5842/files/xapasesuxigexotajezo.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/zusetinijux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/3879/0591/files/ffxiv_chocobo_quest_gridania.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_off000068f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68F4 5064 bytes
SHA-256: 9e02684fbfc222f33e2afa68bcade6e65d0a25a0e41d016d588e47cb12724376
font_01_sfnt_off00007a3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A3C 10184 bytes
SHA-256: eaddfb16a62f5d585e77092cec1267f8025505d0e3a5dafc2f23cb9c7b9e79f6