Malicious PDF — malware analysis report

Static analysis result for SHA-256 84d9c19d7761a800…

MALICIOUS

PDF

71.2 KB Created: 2020-10-27 21:20:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: c2d099163dc53d79bb31d967dc97da59 SHA-1: 1f79ec77ced4cc7eeb749e50c24020de477d554e SHA-256: 84d9c19d7761a80065a919394919b578ce152b8c1037d784bde32dd67e0ddc6b
184 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 embedded links, many of which point to disposable hosting and redirector infrastructure, indicating a link farm designed to drive traffic to malicious sites. The document body itself contains a URL that appears to be part of this scheme, attempting to lure users with a search query. No scripts were extracted, but the PDF structure and link farm heuristics strongly suggest a malicious redirection attempt.

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=persepolis+1+and+2+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384152/normal_5f91bdb9aafa4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369518/normal_5f90c85155543.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389581/normal_5f97b369bd70d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367281/normal_5f89bc891a884.pdfIn PDF document text
    • https://nakumupapetiz.weebly.com/uploads/1/3/2/7/132741615/lofepabalefunoxu.pdfIn PDF document text
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/d2ed8d8fa88d8.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/jizikijegare.pdfIn PDF document text
    • https://mamunazeve.weebly.com/uploads/1/3/0/8/130814121/nerakupekep-loxixojevo-kagopesaredes.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/c2926e035a3.pdfIn PDF document text
    • https://xusawoji.weebly.com/uploads/1/3/0/7/130739635/7385048.pdfIn PDF document text
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/6764384.pdfIn PDF document text
    • https://sebiwijojemobod.weebly.com/uploads/1/3/4/0/134097571/625074.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/2360519.pdfIn PDF document text
    • https://ragidogatekanex.weebly.com/uploads/1/3/4/3/134388076/vemafi.pdfIn PDF document text
    • https://veraweno.weebly.com/uploads/1/3/0/7/130739577/158875.pdfIn PDF document text
    • https://fidevawane.weebly.com/uploads/1/3/0/8/130814252/4203336.pdfIn PDF document text
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/gedemeti_vemopu_nurowetovideler.pdfIn PDF document text
    • https://pirovosarelivo.weebly.com/uploads/1/3/1/4/131406751/tanirafar_banojuwazukevos_lugejejogof_gikegegor.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/b2a0ba6e-edcc-4d07-9982-91bcd9ad4693/pufubovisi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32873001-c6fc-478b-ac64-f955031f1f26/cress_marissa_meyer_vk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0752/7077/files/describe_a_person_esl_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1343/8110/files/declarative_and_interrogative_sentences_worksheets_grade_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7371/5361/files/three-toed_box_turtle_gender.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2094/9403/files/whatsapp_for_dual_sim_android_phones.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_off0000d80d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80D 5220 bytes
SHA-256: dc43c3e8c2d16418e9c28f85f657ccf35e4c3c3a88891704636366d5e0e59c13
font_01_sfnt_off0000e9d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D6 11052 bytes
SHA-256: 84a3988e8907cf5753687b442fad05ab791a4ae4073550937ddbbf0ee957782e

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