Malicious PDF — malware analysis report

Static analysis result for SHA-256 d08ad65119357aa8…

MALICIOUS

PDF

36.7 KB Created: 2020-11-03 23:23:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d5d31eb6867da3ec3b2a6b15cea9ab20 SHA-1: 7b2af237c95ea79d937d658b59efdcc0ac3e4335 SHA-256: d08ad65119357aa8fe55c8e5e7c459132d73f837da61cd43e822d5803a685e71
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to link farms hosted on disposable domains, indicating a likely SEO manipulation or content distribution scheme. One critical heuristic identified a link to known malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to lure users to external, potentially malicious, content.

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/123?keyword=lyrics+to+good+good+father+in+spanish In PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/zuzotol-vosim-gamekowa-xoxabuwetadexe.pdfIn PDF document text
    • https://xufolonul.weebly.com/uploads/1/3/2/6/132695880/sabitifubuxasenu.pdfIn PDF document text
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/batepudikituk.pdfIn PDF document text
    • https://bulavanu.weebly.com/uploads/1/3/4/3/134341337/6173691.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393624/normal_5f934fdfeeed8.pdfIn PDF document text
    • https://rukutatonaneto.weebly.com/uploads/1/3/4/0/134012616/bizid_gomis_muputukoxe_mikitunotebor.pdfIn PDF document text
    • https://fijudemi.weebly.com/uploads/1/3/4/4/134400988/a76fa.pdfIn PDF document text
    • https://zisokilusativ.weebly.com/uploads/1/3/2/3/132303079/xipeziwefon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/45f3ec40-8fb0-413c-81b6-4b8a7829c8a5/64911310154.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/nemitotoduvutuxabexa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01d28906-f60d-4ceb-9730-5388acbe1bfb/93205797005.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/human_population_growth_answer_sheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47B9 5216 bytes
SHA-256: ba7d222cbe29ddb4e468422ce43733b68e0d009425e26f5dacb7fdc199079bb0
font_01_sfnt_off00005972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5972 8908 bytes
SHA-256: 03fe41dec8854be5a8c16ef7236b0d083c89133711ee7344829077cfae636202
font_02_sfnt_off00007804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7804 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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