Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba0599e2e6b68b3b…

MALICIOUS

PDF

40.6 KB Created: 2020-10-10 21:00:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 23ec5a98c2724a9458e72cf35050d004 SHA-1: 60891425089b31918755046507dc67b24456ae6a SHA-256: ba0599e2e6b68b3bc66ce9b2bca3523c1cf505a524c6a2447323c8d08dbd0ac1
184 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many pointing to external PDF documents hosted on various domains. One of these links, https://gettraff.ru/strik?keyword=tabela+de+adi%25C3%25A7%25C3%25A3o+para+presbiopia, was identified as a malicious redirector. The document's structure and the nature of the links suggest it is part of a link farm or SEO manipulation scheme, potentially used to distribute malicious content or drive traffic to malicious sites.

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://gettraff.ru/strik?keyword=tabela+de+adi%25C3%25A7%25C3%25A3o+para+presbiopia In PDF document text
    • http://nazule.momateething.ca/uploads/1/3/1/8/131857580/3018906.pdfIn PDF document text
    • http://files.californialightingconcepts.com/uploads/1/3/2/3/132303269/ea8a043c.pdfIn PDF document text
    • http://zovafefox.rmumcbristol.org/uploads/1/3/0/8/130874075/6095719.pdfIn PDF document text
    • http://jemezo.vacavillegaslighters.com/uploads/1/3/1/3/131381166/d56d17576aeb.pdfIn PDF document text
    • http://xasanadi.trampntrekker.com/uploads/1/3/1/8/131871864/guvuj_kemiviladu_babajob.pdfIn PDF document text
    • http://files.islandhillfarm.ca/uploads/1/3/0/8/130813643/9566384b.pdfIn PDF document text
    • http://xetatuvod.lucygrayconsulting.com/uploads/1/3/1/4/131406895/2447101.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/80302b3f-cd4b-4f71-b04b-bcfc73d7bdae/silitokom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ce148da-630c-4e5f-8ab8-752758cfe07f/lapebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b837c8c7-d84e-4979-b493-4b89344af2d2/47761469288.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37142f92-2887-4513-9ac9-3374d196ae6c/sujenizikavadofimina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6694/9269/files/trait_and_factor_theory_of_career_counseling.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2403/0618/files/gisix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/1961/0530/files/lakosovudugog.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_off00005cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB6 5540 bytes
SHA-256: 7864da611384d5b299c7131a31fd785a44ddfea22b5805761cc66fb5d9ea4531
font_01_sfnt_off00006ef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF3 12308 bytes
SHA-256: e54710f92f901de6be2d55b4aaf482153e53255d5ffa068976af3e66a0192b5f

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