Malicious PDF — malware analysis report

Static analysis result for SHA-256 608b9cb6c71ffe5b…

MALICIOUS

PDF

79.7 KB Created: 2020-12-04 02:59:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 246993ebe8627410f470e90f2e991ee1 SHA-1: 15446a9411bdd88b152261f49bd58fad7511c069 SHA-256: 608b9cb6c71ffe5bfb318a04b13fea64c7308b5bbed1d1447fa2c465de86f5a5
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many hosted on disposable domains, characteristic of a link farm. One of the embedded URLs, https://gettraff.ru/aws, is identified as a malicious redirector. The ClamAV detection and ML classifier further support the malicious nature of this document, likely intended to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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/aws?utm_term=efectum+pro+apk+slow+fast In PDF document text
    • https://bizevino.weebly.com/uploads/1/3/4/3/134320064/2cede2ad616.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f87150f5bffe.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/20603467451.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382412/normal_5fc2d0c7c98f6.pdfIn PDF document text
    • https://miwomineferele.weebly.com/uploads/1/3/4/5/134514444/2272153.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/bemefajat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462351/normal_5fa61c60bfa86.pdfIn PDF document text
    • https://xixozikitep.weebly.com/uploads/1/3/4/0/134097223/tejabekijikutom.pdfIn PDF document text
    • https://dudakodut.weebly.com/uploads/1/3/4/4/134497067/81943c6a99c1.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/61596332986.pdfIn PDF document text
    • https://dejaxunex.weebly.com/uploads/1/3/4/3/134318563/4169275.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/budgeting_meaning.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449777/normal_5fbd99a72fe22.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1cb88ce-9041-47fe-be79-67e76cb72b97/dallas_flea_market_dallas_north_carolina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06033a76-a4ec-41ce-8784-0444c50c4d32/98327700109.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cde9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE9 6744 bytes
SHA-256: ffeb89eaad713c9717385028f79c9757067aafb2c2382ea8cbab0e6efe35a425
font_01_sfnt_off0000ded1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED1 5276 bytes
SHA-256: be14e58e6e16725da71baad26b196d43d5e2f817491080f6e76cbc98a5d68427
font_02_sfnt_off0000f0c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C4 13500 bytes
SHA-256: ddbe098ab296dcac8ed8b2a46cd2d9f9eeaca3ea456a5ff08c24096372689197
font_03_sfnt_off00011bbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BBD 16312 bytes
SHA-256: 028dbaa76d48ae99b02248bacea50134e27ed131f5dd39e25ac401de8961e19b