Malicious PDF — malware analysis report

Static analysis result for SHA-256 58fad64fe6961eb4…

MALICIOUS

PDF

35.7 KB Created: 2020-10-30 19:16:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eeb4d52c72668d7051b9062787eb6965 SHA-1: 1aa0fa56d2aa0d8dc35a25448201de145811878c SHA-256: 58fad64fe6961eb44dd1666ca8b8f56114aa5aaec0835f09e7e8377f2a7a3ab3
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious sites. One prominent link, 'https://ttraff.link/123?keyword=frye+campus+boots+clearance', is identified as a malicious redirector. The document body, though heavily obfuscated, contains similar text, suggesting a social engineering lure to encourage link clicks.

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://ttraff.link/123?keyword=frye+campus+boots+clearance
    • https://cdn-cms.f-static.net/uploads/4375350/normal_5f8f1cb728d16.pdf
    • https://zafigitelerom.weebly.com/uploads/1/3/4/3/134338481/1172610.pdf
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5f88b44bd2e24.pdf
    • https://tifubevova.weebly.com/uploads/1/3/4/4/134458665/xuzinumexozibu.pdf
    • https://zekigoduse.weebly.com/uploads/1/3/4/3/134336209/1d6ce2e66eb3d33.pdf
    • https://cdn-cms.f-static.net/uploads/4366341/normal_5f8721a2022c5.pdf
    • https://xubikorapaja.weebly.com/uploads/1/3/4/3/134335605/036cb6ff.pdf
    • https://cdn-cms.f-static.net/uploads/4387233/normal_5f8ed2d453999.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/12908c51-5a13-4879-88dd-c67b6310df17/vizugimuzuwotesujamegekif.pdf
    • https://uploads.strikinglycdn.com/files/8156bd2b-1a99-4817-953e-95cd0467f0a7/rubrica_para_evaluar_cuadro_comparat.pdf
    • https://uploads.strikinglycdn.com/files/fa3f0ba2-1797-4518-b058-5bb84136275e/59788094488.pdf
    • https://uploads.strikinglycdn.com/files/8d7f4264-5cd6-40e3-990b-736ac66b9299/89159361237.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004969.bin
35470154d8a84b86b1329cc2f268b4c5ba4dd3b35a3cf9217dedd0c6f243288f
pdf-font-stream PDF embedded font (sfnt) at offset 0x4969 5276 bytes
font_01_sfnt_off00005b4b.bin
5451840323985d7cfc5a28a78c06c3b121ce84d2c163e5275600aa66ea7fe923
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B4B 11508 bytes