Malicious PDF — malware analysis report

Static analysis result for SHA-256 31f07a1071d4ef64…

MALICIOUS

PDF

37.4 KB Created: 2020-10-19 18:40:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0679e0841f8d50fa77fbf0e9efb91b89 SHA-1: ae67d7acb82a3db8fa43c86537eeebab9d5a9d7e SHA-256: 31f07a1071d4ef64761acd62bc73010b0cc0d67003cac52af098d10db204d941
184 Risk Score

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.me/123?keyword=weil+mclain+boiler+parts+manual In PDF document text
    • https://xawuwotogot.weebly.com/uploads/1/3/2/6/132695388/0238ed3.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/8554420.pdfIn PDF document text
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/fotevaxu.pdfIn PDF document text
    • https://jugoruzaja.weebly.com/uploads/1/3/1/4/131407370/bavafabozipibat.pdfIn PDF document text
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/vabisulenujapa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387806/normal_5f8d23f6ec2b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368750/normal_5f8d72b799966.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369654/normal_5f8cc1a720e57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374688/normal_5f89f04d9e6c6.pdfIn PDF document text
    • https://tarirubawapub.weebly.com/uploads/1/3/1/6/131606173/putujumaxijemipade.pdfIn PDF document text
    • https://xodetawutal.weebly.com/uploads/1/3/0/7/130774968/didew.pdfIn PDF document text
    • https://kelobutino.weebly.com/uploads/1/3/0/9/130969458/3121684.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/13fd4695-6fb7-4121-90bc-bf8e23ec0f7c/73408123057.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25a590d3-f19a-4902-b2b2-090fb111572e/46032084927.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd5ec6b0-f08f-4815-bace-c72a049e9828/5838660750.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4202/9215/files/etisalat_smiles_app_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9334/3912/files/iec_61439-6_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3897/3345/files/78988348515.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/6033/9103/files/elf_on_the_shelf_letter_template_download_word_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5459/0880/files/6557757926.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4012/6614/files/xipalugesuvi.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_off00005299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5299 5232 bytes
SHA-256: f86a9bd645edd2e33c246e0080c44b6fd703484884c6ade262bb5a586b164955
font_01_sfnt_off00006447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6447 11172 bytes
SHA-256: 9f458c586aff1998a967c9dc74fb23e1f81a374d22e830ef2a20d38a13a3325f

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