Malicious PDF — malware analysis report

Static analysis result for SHA-256 c27cb18e542e6896…

MALICIOUS

PDF

46.5 KB Created: 2020-07-10 13:11:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 40a8ce0c462e79c6a62200bdef0e943a SHA-1: 33068f0b87003f3a361e18f76616412422750c5a SHA-256: c27cb18e542e689606061ba2f1b148b1170c1c413d267ed646021f9d32001b3e
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic. One of these links, https://ttraff.com/wb?keyword=destierro%20de%20sombras%20o'gorman%20pdf, is flagged as a malicious redirector. This suggests the document is designed to lure users into clicking these links, which likely lead to malicious sites for phishing or malware delivery.

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=destierro%20de%20sombras%20o In PDF document text
    • http://files.beautrix.ca/uploads/1/3/1/4/131453021/8285402.pdfIn PDF document text
    • http://files.dart-bayernliga.com/uploads/1/3/0/9/130969597/mozidi_fisokiniz.pdfIn PDF document text
    • http://files.hubcaphobbies.com/uploads/1/3/1/1/131164418/68c74213.pdfIn PDF document text
    • http://files.ullrichsstore.com/uploads/1/3/1/0/131071308/vuludimiweg-fusezomoriwubuw-tijoxufepo.pdfIn PDF document text
    • http://files.lavenderlanemi.com/uploads/1/3/2/6/132696263/302973682aa.pdfIn PDF document text
    • http://files.faithgoenner.com/uploads/1/3/1/6/131606295/3665533.pdfIn PDF document text
    • http://files.happybuddha-aruba.com/uploads/1/3/1/4/131483778/fff5685192143.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://zugomesemuz.files.wordpress.com/2020/06/23802196528.pdfIn PDF document text
    • https://guvadade.files.wordpress.com/2020/06/18859286761.pdfIn PDF document text
    • https://niwifavazu.files.wordpress.com/2020/07/marofepigas.pdfIn PDF document text
    • https://miteduxom.files.wordpress.com/2020/07/59891236270.pdfIn PDF document text
    • https://lirajobavan.files.wordpress.com/2020/06/70548593761.pdfIn PDF document text
    • https://vakowozobo.files.wordpress.com/2020/07/sujonegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0185/5646/files/lobuzegegamojum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wajumibuxup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/volobufepafolosovi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kesazemoluvumexon.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_off000075cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75CC 5292 bytes
SHA-256: 36fd2dbe9c309a6fabd15616a3cc2dadcb8f4683d8e021266799b6992bcba0d1
font_01_sfnt_off000087b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87B1 10776 bytes
SHA-256: e582715d0d8a7b28ad1eac1aa56135cc6b91f955e53bef0ab4e79866ce702fed

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