Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed1ffecc7ceca1a5…

MALICIOUS

PDF

39.2 KB Created: 2020-10-08 06:00:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: be3d8f89d8c8602f3bf149af21c60464 SHA-1: f9f8d7d956e9a2e1dea862f1dfa07a0ea226df3e SHA-256: ed1ffecc7ceca1a5aed7eaea79eb9ac23727f9a6be15247c7bce3ea4e071d5ba
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded URLs, with a primary link identified as a malicious redirector. The ML classifier strongly indicated maliciousness, and heuristics confirm the presence of a link farm on disposable hosting. The document's purpose appears to be to lure users into clicking these links, likely leading to a malicious website or payload download.

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/strik?keyword=reglas+de+nomenclatura+botanica+pdf In PDF document text
    • https://site-1042892.mozfiles.com/files/1042892/vinej.pdfIn PDF document text
    • https://site-1038349.mozfiles.com/files/1038349/55381826552.pdfIn PDF document text
    • https://site-1036909.mozfiles.com/files/1036909/48326671454.pdfIn PDF document text
    • http://zaburipun.bearcreekanimalclinic.com/uploads/1/3/0/7/130739718/livovagemuwurovula.pdfIn PDF document text
    • http://files.wakingupwilder.com/uploads/1/3/0/7/130775654/6601ac659.pdfIn PDF document text
    • https://site-1039668.mozfiles.com/files/1039668/13046845151.pdfIn PDF document text
    • https://site-1037275.mozfiles.com/files/1037275/luvegusagubuganevus.pdfIn PDF document text
    • https://site-1039490.mozfiles.com/files/1039490/41720230420.pdfIn PDF document text
    • http://nibarus.ladybugranchllc.com/uploads/1/3/1/4/131483068/8841645.pdfIn PDF document text
    • http://files.info-integratedtherapysolutions.net/uploads/1/3/1/3/131384156/logop.pdfIn PDF document text
    • http://files.myworldimage-nordic.com/uploads/1/3/0/7/130738622/jeladut_wapirud_sepumibi_nagubadeb.pdfIn PDF document text
    • http://files.stepfamily.org/uploads/1/3/1/4/131407424/pezosekijud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00005a50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A50 5620 bytes
SHA-256: 13ee2dddfa9f4d9da0bf6f9ea6782e6a49340516ccab665dd56963d198189bea
font_01_sfnt_off00006d5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D5C 10652 bytes
SHA-256: cd30561ad94914281cfb4be6792f266f5a07f5c3bf9463c92a1e843d15ef36d5

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