Malicious PDF — malware analysis report

Static analysis result for SHA-256 abc82735ae55ffda…

MALICIOUS

PDF

37.7 KB Created: 2020-11-08 01:55:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 7b52d6d639851e4d1ed6986827e155dc SHA-1: 5fdcc78e7e504fc81df043c3f8c9919b8b1ea90b SHA-256: abc82735ae55ffda1817daf14768f15b50b214acf3a10160e2053ccb87bddd30
66 Risk Score

Malware Insights

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

The PDF document contains embedded URLs, including one pointing to 'trafffi.ru' with a keyword suggesting pirated content. The ML classifier strongly flagged this PDF as malicious, and heuristic rules indicate it functions as a link farm on disposable hosting. While no scripts were directly extracted, the presence of embedded URLs and the nature of the content suggest an attempt to redirect users to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/aws?keyword=vampire+diaries+season+6+free+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375517/normal_5f8bab5bb086d.pdfIn PDF document text
    • https://zosevozosi.weebly.com/uploads/1/3/4/5/134527099/1467363.pdfIn PDF document text
    • https://jupisururixed.weebly.com/uploads/1/3/4/3/134339091/fovog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379605/normal_5f8b26d1c5c6f.pdfIn PDF document text
    • https://fomukudir.weebly.com/uploads/1/3/4/4/134403856/3384896.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/9281406.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jusuberu/mystery_of_belicena_villca.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/suboxesoji.pdfIn PDF document text
    • https://zedapakaxivi.files.wordpress.com/2020/11/dragon_ball_gt_a_heros_legacy_english_dub.pdfIn PDF document text
    • https://beziduxonet.files.wordpress.com/2020/11/vomufepikarigutap.pdfIn PDF document text
    • https://lodoxepal.files.wordpress.com/2020/11/reremuradivuvevedivogobid.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/47937991423.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/best_reader_for_kali_linux.pdfIn PDF document text
    • https://saridejawe.files.wordpress.com/2020/11/dunajaw.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/muvupasitubojovusokonifeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b537eb8d-4ac3-4de4-8465-54399f5a9d42/31422467611.pdfIn PDF document text
    • https://lodoxepal.files.wordpress.com/2020/11/vibinofa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48B0 5016 bytes
SHA-256: 901cde86f6b9e56182ce5356be1c7a631a151d037c0bb8519a91564b92825f0b
font_01_sfnt_off0000599c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x599C 10040 bytes
SHA-256: 7e1736d860ac3dd8a83091fc5004f2b64ca417ef4ebd247ffdb0194ea1c4edb8
font_02_sfnt_off00007b84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B84 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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