Malicious PDF — malware analysis report

Static analysis result for SHA-256 59a20c9429c00cea…

MALICIOUS

PDF

71.1 KB Created: 2020-12-23 14:37:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 47ac777a51c80648f3e425daa981bca1 SHA-1: 9380b2fe902354da928ca0557653d752079a65fb SHA-256: 59a20c9429c00cea73ac47d7166372ec70a20fccec6405b77b5bb3dd20aa440d
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. One of the primary external links points to 'trafffe.ru', which is suspicious. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were directly extracted, the structure suggests a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/aws?utm_term=articles+of+faith+james+talmage+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4380086/normal_5fe2895384a3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484633/normal_5fd7cf51b8187.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458125/normal_5fc73b652e53c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428043/normal_5f987ecf23d7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369904/normal_5f942355e1d44.pdfIn PDF document text
    • https://lekomuge.weebly.com/uploads/1/3/4/7/134773229/2925273.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374021/normal_5fe14e8fd77a9.pdfIn PDF document text
    • https://pukakiliratof.weebly.com/uploads/1/3/4/7/134768090/junutig.pdfIn PDF document text
    • https://zademufexek.weebly.com/uploads/1/3/4/7/134765537/9394337.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381104/normal_5f9e850a4c799.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/nunakixuma/96099894403.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/32570010002.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/85441455346.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/business_intelligence_development_studio_2012_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/lindsay_phillips_shoes_ebay.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/47658458848.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/1275312483.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/ib_biology_biozone_workbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/ww2_crossword_review_answer_key.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_off0000d644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD644 5636 bytes
SHA-256: f482b5f836d81136ef73d0db5c465b266ff989dc44c7c7802451c8d8a34a0cce
font_01_sfnt_off0000e94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94A 11300 bytes
SHA-256: 3380bf394443ac62f3a2f85bda027e6bcea5009f9523565450bb34d502336211

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