Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ad18558947047cb…

MALICIOUS

PDF

73.0 KB Created: 2020-12-23 00:35:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 95f16f9aa7911a9fbbf6771b9b823270 SHA-1: 9d8cfb02c43b10df96d41c74487c74f9a9f7fa4f SHA-256: 2ad18558947047cb1b821246a4b25417e68902b6ac7bf23c565177271eb38de1
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a link to known malicious redirector infrastructure (ggtraff.ru). Another critical heuristic indicates a PDF link farm, suggesting an attempt to obscure the true destination or generate traffic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/aws?utm_term=vargmul+1+to+100+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4482407/normal_5fca2c3363daa.pdfIn PDF document text
    • https://ruwatija.weebly.com/uploads/1/3/4/8/134846771/sodixena-ralegodaso-buxomoxig.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/wulotugadag/88920357944.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/8721747566.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/graphing_from_factored_form_worksheet_1_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/pf_auto_typer_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/gidozuvadixilew.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/47456254822.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf65cbbc819f1cf4d0a0ab/1606378955892/lerapofejifilameba.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6996ecd1e280355fbbd79/t/5fce40bf0ab5d62feb1f51ab/1607352512072/strategy_definition_in_strategic_management.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1116c11f6a41984869c2f/t/5fc3b0827acac6192a310864/1606660226891/fujifiwuzekenedigaxu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5DE 5344 bytes
SHA-256: 97d8caf3080ff000901af0dc27be23d56804e62cf8ff89e2c5f7990afc7f9fa6
font_01_sfnt_off0000d800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD800 12356 bytes
SHA-256: 6dd949f61267f3f4088f6eb2eca9f1795a547ba6aaae93aeab9a27072cd873af
font_02_sfnt_off0001029a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029A 16088 bytes
SHA-256: 0bbf76e900b9e42cd81c73be5093fa99d4c720fd953fe3a64a380064512c8b5c

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