Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d4168737631fed1…

MALICIOUS

PDF

45.6 KB Created: 2020-11-02 11:06:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7ea6daa9d4d3b330a9c774c56966748a SHA-1: 1a8d1c2e1dc4e16e89dbccee93645eb6f5aa155e SHA-256: 1d4168737631fed199d79a2e627f7c5799de97c14e7d3fc461ebba2c14be05b6
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector URL, ggraff.ru, which is flagged by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded link suggest an attempt to lure the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://ggtraff.ru/123?keyword=local+tv+channels+on+apple+tv In 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/zonivezada/kaxisomipobirufizojude.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe8a040b-d6bb-4d40-88d8-dd896129a22e/marco_fireplace_792_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/lopazura/stealin_home_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/multivariate_data_analysis_6th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39be9994-6997-446b-9916-614416776659/67121928338.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebd2dadc-d8f9-4eb0-b020-955631b52744/gexabaroroxesara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db6b1bf8-9ae6-4843-a1b1-b9a277d3c447/86901698425.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8887d1a-de56-4286-95f7-11792aacdac7/49716301908.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/20630731460.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ff36d30-ed2b-42b8-bd11-b4bb76a05bd7/54633758089.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/aichi_targets.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_off0000679c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x679C 4668 bytes
SHA-256: 26188200c30369db3f7a125bc211441d965cf30012f02725e9b0e43c9719acd0
font_01_sfnt_off0000776a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x776A 10588 bytes
SHA-256: 3e0313a35258f6291e0c45cc7f06941935702a06f390cd649742a2127d53c342
font_02_sfnt_off00009bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BAC 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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