Malicious PDF — malware analysis report

Static analysis result for SHA-256 df89109832fb1684…

MALICIOUS

PDF

48.0 KB Created: 2020-11-01 20:00:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f9647838aedba372b63092f5e34acc8f SHA-1: db8821dbec3649432bb19e77715685600010545c SHA-256: df89109832fb1684d7e56c59cc653396719fda09c8dd5b37872709fce16c29b0
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://ttraff.club/123?keyword=naruto+shippuden+episode+162+english+dubbed In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366366/normal_5f9c71c716865.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386349/normal_5f9834dc473ff.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://s3.amazonaws.com/mamibis/guvetob.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/falling_creek_elementary_school_elberton_ga.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/la_pavoni_pa-burr_coffee_grinder.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/carrie_2_full_movie_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/ccna_routing_and_switching_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/composite_materials_science_and_engineering_download.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/duzek.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/gepagerodupijuwek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2366/0732/files/muvubozamifa.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/15393100792.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/kelvinator_opal_freezer_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/74010979760.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/home_design_catalog.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/beginners_guide_to_indian_stock_market.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/ropixemipomifig.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5551 5548 bytes
SHA-256: 0bff0ebbf813da9def00e8ad626b2b16f03235b3b7f81d8aeccdfa0bb8d5afac
font_01_sfnt_off00006827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6827 11384 bytes
SHA-256: a412e41b3fcd98104082d74da30c968abe752b7730be524c4c299f33c567ab6d
font_02_sfnt_off00008f52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F52 16144 bytes
SHA-256: 18f56b7fae04e07bc119a468ad323bdda099da77b0772854d1c47cc1f39b9f3b
font_03_sfnt_off0000a452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA452 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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