Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2e337d6070e4178…

MALICIOUS

PDF

53.8 KB Created: 2020-11-07 06:42:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 5779a27d90f7e921ce1d767e2188a58a SHA-1: 70972d59d55b34b3a0bc518807b1f0477b1e5804 SHA-256: a2e337d6070e417820aef2d323dd1c4bc40e5aadff334fc133228cf2b223a973
124 Risk Score

Malware Insights

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

The PDF contains embedded URLs, one of which, 'https://gettraff.ru/123?keyword=google+forms+tutorial+2018', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other links, suggesting a lure to a malicious site. The ML classifier strongly indicated maliciousness, and the PDF structure points to a link farm designed to redirect users.

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 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.
  • 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/123?keyword=google+forms+tutorial+2018 In PDF document text
    • https://basuxebuj.weebly.com/uploads/1/3/1/3/131379820/5515454.pdfIn PDF document text
    • https://labajilawuja.weebly.com/uploads/1/3/1/4/131406369/faxewepifikugew.pdfIn PDF document text
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/9948166.pdfIn PDF document text
    • https://sexozorojupur.weebly.com/uploads/1/3/4/3/134390270/xugiva.pdfIn PDF document text
    • https://wanuwoziburake.weebly.com/uploads/1/3/4/4/134458428/fce372.pdfIn PDF document text
    • https://zinivopupo.weebly.com/uploads/1/3/4/3/134386920/8cff5f2764d571.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sabegokek/life_of_pi_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/pulifexijafinukixe.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/summoners_war_co_fire_death_knight.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/kusifekazetovizivuz.pdfIn PDF document text
    • https://vuxeginup.files.wordpress.com/2020/11/xujasivepipalofiredidixi.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_off00008600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8600 5636 bytes
SHA-256: 54b67897ab3fd7c2b7bf2d34e0e2b9f3c041e4465887dda32c445cd9e0ec7d93
font_01_sfnt_off0000991f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x991F 15692 bytes
SHA-256: ed44d07ddae549ea7a46a36e226e73a281150c58c226103005ef62abc8caf497

Open this report in the interactive analyzer, or submit your own file for analysis.