Malicious PDF — malware analysis report

Static analysis result for SHA-256 65f8496e08293abe…

MALICIOUS

PDF

36.8 KB Created: 2020-07-09 10:38:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 8599ec01340194cc02e401773d210ddb SHA-1: 1e740753179bc4b6b25dfa646e88a7dc9986ab51 SHA-256: 65f8496e08293abee7141843be7cca9e32be36564261edc69c5047a44feba6e7
184 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links pointing to external PDF files hosted on numerous disposable domains. One of the embedded URLs, 'https://ttraff.com/wb?keyword=roland%20tr8%20manual', is identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence, indicating malicious intent. The document's structure and link farm nature suggest it's designed to distribute malicious content or manipulate search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://ttraff.com/wb?keyword=roland%20tr8%20manual In PDF document text
    • http://files.morethansoulfood.net/uploads/1/3/2/3/132302973/timuf.pdfIn PDF document text
    • http://files.erinboake.com/uploads/1/3/0/7/130776718/maxul_zefanenumu_ruxuxotevar_jazomagudigem.pdfIn PDF document text
    • http://files.asliagirbas.com/uploads/1/3/0/7/130776841/07f27bfa0f9527.pdfIn PDF document text
    • http://files.paiboon.biz/uploads/1/3/1/4/131406762/1208977.pdfIn PDF document text
    • http://files.thedottedpig.com/uploads/1/3/2/7/132712251/f5a73.pdfIn PDF document text
    • http://files.surrenderedtochrist.org/uploads/1/3/2/6/132681656/wulegi.pdfIn PDF document text
    • http://files.oaklandyardtournaments.com/uploads/1/3/0/9/130969300/3815936.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://likoruki.files.wordpress.com/2020/06/tebowigup.pdfIn PDF document text
    • https://kezinoniwet.files.wordpress.com/2020/06/lirebegareli.pdfIn PDF document text
    • https://lixakukebup.files.wordpress.com/2020/06/nulixurosotuxadupa.pdfIn PDF document text
    • https://rogofuxeviso.files.wordpress.com/2020/06/57177075978.pdfIn PDF document text
    • https://jovemubam.files.wordpress.com/2020/06/negodi.pdfIn PDF document text
    • https://lulaguledev.files.wordpress.com/2020/06/59175491165.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66689816557.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuxovozukirofavekejob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/marifurozijuzaledenikegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81667611697.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/47184882359.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53E1 4708 bytes
SHA-256: a7cc44c9d6d279b6c213bbaeba86f54399658ad46f3d50392c9bd768f973234f
font_01_sfnt_off000063b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B8 10232 bytes
SHA-256: df0a3ab83abff3606483f1e3a40a9967e78f8ce0377e7383e9da958e0fe15f2a

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