Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d3c7cc2e974d756…

MALICIOUS

PDF

44.2 KB Created: 2020-10-31 02:55:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: fa64f734084c427e55350a65282cf5a8 SHA-1: 76c23eb68bbc85b113f620be7b7c245599dae0c5 SHA-256: 6d3c7cc2e974d7564e4ea879b3cface4992919bac92b5e51c9bb5bdb3718844d
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.link/123?keyword=another+word+for+team'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the redirector link strongly suggest an attempt to lure the user to a malicious site, likely for 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.link/123?keyword=another+word+for+team In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369764/normal_5f87e381baee8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412164/normal_5f9c90829e00d.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/6379346f-57c9-41ec-85c2-0e2b2eb969b1/kofusonebuzigasuvotoduxaz.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/xoduropomegalawum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59cce4c5-97d9-4974-a4a6-67136838dbea/difowipabedilepozad.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/learn_spanish_lessons.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/304a3a41-aaab-49c0-8e39-bf68b49b41dd/close_up_pics_answers_level_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d97fbc80-d1c9-4e0b-90ba-09a9bd769915/lotujid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50260b57-4e7e-4bae-8abe-6f7ba2581734/dilizobuzogidoxape.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/3655847199.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/surah_al_waqiah_terjemahan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76d0c7d9-43e1-48cf-8924-3abea884891f/47482837427.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fc7e152-53c2-4760-b09c-f56b4666ee35/bafipimedeminukosevirifo.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_off00006c24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C24 5016 bytes
SHA-256: 1b73405d2118d014be449f5ef61ee624e68b7298fe380136a30b447107ab559b
font_01_sfnt_off00007d20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D20 11612 bytes
SHA-256: 43ba7d49af25fe2309a55568d5fcfe8ac501dbdfc70657dae2277b6a2672f105

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