Malicious PDF — malware analysis report

Static analysis result for SHA-256 5da3a0c5ba712743…

MALICIOUS

PDF

60.9 KB Created: 2020-11-16 17:46:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: ee83a5d9adec80d74f91f417416d4a2d SHA-1: d46dc0543968268dbd0074e8d9cea9849f2da5ec SHA-256: 5da3a0c5ba712743c59ff830b6652c004d9e3dcc1ef795e7c0d6becf859f2240
214 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to known malicious redirector infrastructure, specifically pointing to 'ggtraff.ru'. The document body, though heavily obfuscated, contains text suggesting an educational context ('Distributive property equations worksheet with answers') which is likely a lure. The presence of numerous embedded links, including a link farm, further supports a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=distributive+property+equations+worksheet+with+answers In PDF document text
    • https://kofufavok.weebly.com/uploads/1/3/4/3/134313370/jatazikizimeg_bomizogokak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368752/normal_5f8a0e58f28b3.pdfIn PDF document text
    • https://jirunemopisitex.weebly.com/uploads/1/3/4/3/134332051/gaxuv.pdfIn PDF document text
    • https://zunejafeg.weebly.com/uploads/1/3/4/3/134382709/lemumelawaxisi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379722/normal_5f9a88604030a.pdfIn PDF document text
    • https://kobizixudowizeb.weebly.com/uploads/1/3/4/4/134402546/3622444.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450140/normal_5fa248f6c468b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375708/normal_5fa04c8dcb07b.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/sogovukanu.pdfIn PDF document text
    • https://sulabejo.weebly.com/uploads/1/3/4/6/134689147/mokoxumup-rajisegumekimas-gugetedasi.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/kukazowox/operational_risk_management_gfmi.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/73634845275.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/tugowuperotavefimum.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/lenovo_thinkpad_t540p_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/ravikixonirisewotuneroni.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b1ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1EC 5456 bytes
SHA-256: ece3309ac781a9ede9ee29c87469d487dfbae103717849f32b4b21c70f30967b
font_01_sfnt_off0000c494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC494 9852 bytes
SHA-256: 5f4d2a0042394f4e32dadfc41afea9cef1f4c2e5bb887ed982bf1f47749af1f0

Open this report in the interactive analyzer, or submit your own file for analysis.