Malicious PDF — malware analysis report

Static analysis result for SHA-256 d389dea8b1745f4c…

MALICIOUS

PDF

44.0 KB Created: 2020-11-03 08:17:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2a3e43233cf14e21560f0578db421409 SHA-1: 12f7e1274d428b1bc4bce8ba06232e2527b76a04 SHA-256: d389dea8b1745f4c8ba814933a0b5f58660049bb4031e3b6cb0953b4e4a8b62e
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body also contains the URL 'https://gettraff.ru/strik?keyword=joker+stream+live', suggesting a lure for live streaming content that redirects to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links indicates a link farm or redirection attempt to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gettraff.ru/strik?keyword=joker+stream+live In PDF document text
    • https://cdn-cms.f-static.net/uploads/4406191/normal_5f94ef534629f.pdfIn PDF document text
    • https://wadazujirala.weebly.com/uploads/1/3/4/5/134596454/nodapikesutiko.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/de4022cf2ed9ee.pdfIn PDF document text
    • https://leputixoted.weebly.com/uploads/1/3/2/6/132683438/2339750.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/fenatagazise/wenopekotebabopasebaka.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/3887007144.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/38768202634.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/98363310041.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/73239762030.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/tunein_radio_apk_full.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/mrp_material_requirement_planning.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/hermes_vestige_part_b_code_vein.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/aicte_approved_colleges_list_2019-_20.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_off0000616f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x616F 4628 bytes
SHA-256: 84a2dc8a63cd3571965fa2276bf188d833531a8d1232a3532c5d5e0c3567ef84
font_01_sfnt_off0000712b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x712B 10656 bytes
SHA-256: 6fcc55b1854debb652fd9323870187d7399e1b26989adf0558c4a1bbbbb7ebb5
font_02_sfnt_off0000958e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x958E 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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