Malicious PDF — malware analysis report

Static analysis result for SHA-256 60115a0d5579faa9…

MALICIOUS

PDF

45.6 KB Created: 2020-11-03 07:19:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: ea68b5fd608a375b1b904f703a54b430 SHA-1: d7ade6a2ef447e9f633cedb54475effff0d297d0 SHA-256: 60115a0d5579faa96a925136b0abe87d0462e1a20c93a3fada8e998d023781bd
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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=protein+synthesis+worksheet+part+c In PDF document text
    • https://fuwozubasuzej.weebly.com/uploads/1/3/4/4/134473550/gonifilidowuratalu.pdfIn PDF document text
    • https://tenikekiso.weebly.com/uploads/1/3/0/7/130775729/bd560463d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385009/normal_5f9c24c5c9255.pdfIn PDF document text
    • https://kasukironumasex.weebly.com/uploads/1/3/1/4/131454791/vexug.pdfIn PDF document text
    • https://kiwemedorupa.weebly.com/uploads/1/3/4/4/134446537/limexatapo_foxupi.pdfIn PDF document text
    • https://famotufenimuz.weebly.com/uploads/1/3/4/1/134132127/kibagetisef_rexijuruku_bugekaxude_patusu.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/5c1eaf88-73fc-4115-bdf8-0aa26cd3dc6e/witerifusif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/4252/7128/files/wakavaxap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db450cf1-832c-4667-a5de-6380015c6aab/58739557299.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8578/3747/files/folixat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0688/0667/files/rimogodibotukaloxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bed71264-5f11-4ddc-9c06-c723aa8c74ea/xafusuxasafoxow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d82d30cf-8aa7-45d4-8e00-502150020a7b/56749985956.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84e933a5-e0a5-4862-8bb1-def40d3241fe/call_of_duty_ghost_cheats_ps3_deutsc.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_off0000696f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x696F 5036 bytes
SHA-256: f3c544659d465f0f803736d006d6fe1a3974ebd96049eede695b498519ebb8b7
font_01_sfnt_off00007a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A89 9704 bytes
SHA-256: 8a2f015c387e7da6064413aa93317786807f8c031d179ac13fa509f0fcb2a181
font_02_sfnt_off00009b7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B7E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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