Malicious PDF — malware analysis report

Static analysis result for SHA-256 5185434131948746…

MALICIOUS

PDF

72.5 KB Created: 2020-12-19 20:02:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d33e5f29e462ddd0e8368e80a5454a79 SHA-1: ba25e7903f465ca9e9e1228a3d99bdede6e2ee26 SHA-256: 5185434131948746b3d8fce78e348e2f1df58f3f1347f02bcbee62f6681aca55
214 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure (ggtraff.ru). The document body, though obfuscated, suggests a lure related to an 'accident report'. The presence of multiple external PDF links, some hosted on S3 buckets, indicates a link farm designed to distribute further malicious content or engage in SEO poisoning. The ML classifier and ClamAV detection strongly support its malicious nature.

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=accident+report+bend+oregon In PDF document text
    • https://gowutejuvotebap.weebly.com/uploads/1/3/4/3/134372770/53e0d0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372955/normal_5fa570352e96b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386593/normal_5fb61d8edff74.pdfIn 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/felasorarabipis/litiguvemipepegopa.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/inventory_ageing_report_tcode.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/sukufavulopukulurix.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/62283015517.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/foromefemexikarabowokemog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36dc534f-c0b9-4181-be99-577034c90141/67445631710.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/932000f6-2ae3-4681-957f-eaf1f871d1f4/sitodise.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/jedoworepelarebipetoze.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_off0000d29c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD29C 4740 bytes
SHA-256: 4e4edd7385f4497053bde5882eeca971b74fd4e227529f108fba278dfa7690af
font_01_sfnt_off0000e2ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AD 10668 bytes
SHA-256: 3259701cdd65f38ad8175d42528be9012b03e5d6823a0b15bf4394d7829f815d
font_02_sfnt_off00010700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10700 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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