Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1975139805707dd…

MALICIOUS

PDF

56.5 KB Created: 2020-10-25 12:41:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f96fb3a77d123345a038bd21ec7ce3e8 SHA-1: 2101bdcc24ebf34e8ae35a41330f17457d3114ea SHA-256: f1975139805707dd258fe04aa4f8714276c40be75271a6618a0b32a5d94fb994
154 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 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.
  • 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://cctraff.ru/strik?keyword=australian+shepherd+breeders+austin+texas In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379626/normal_5f8aa7db17e10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412899/normal_5f95387e66673.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369322/normal_5f91e9a1845bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380228/normal_5f9215991b2fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375696/normal_5f9156229ec95.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/ad1ad670-7148-4f9d-a4e7-b01fa26f55c9/66428442628.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdde0ad0-9a21-460e-b1df-f5eb8ad321ec/pozabivevamikukesaneru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/988d9d88-91c2-44ea-b887-560c4098c508/70131475424.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd5d92ce-21f5-49e8-abc7-89f55b29eecd/nilibakogegilafidi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/348064d7-75a1-44cc-879c-07b7c6a5f257/who_is_max_s_mom_disney.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6458/1525/files/cm_to_mm_conversion_table.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4660/3414/files/sanitary_engineering_lecture_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9146/7163/files/97754520899.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/8842/1282/files/norma_iso_31000_version_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0319/9138/files/gilurosiwopavivepagujojog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7527/2855/files/mudaniwatetumosaworidebis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2604/5871/files/zogosakowedavaxabupoziju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/4424/7973/files/hawaii_vehicle_registration_address_change.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8009/7702/files/tivuzinobesevugutura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7970/5783/files/96229639977.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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC7 5016 bytes
SHA-256: ea00edee5a16e70c2ab87f55e3d011ebd07b3702aa4119ed916abe36b78dc754
font_01_sfnt_off00009fb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FB2 11380 bytes
SHA-256: f1fe7a239b32db68ec1d17d4d94063c03f4d273e347ff03341aa6c0eacd59800
font_02_sfnt_off0000c66f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC66F 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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