Malicious PDF — malware analysis report

Static analysis result for SHA-256 9269edf2fd2920dc…

MALICIOUS

PDF

73.8 KB Created: 2020-10-28 11:58:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ebbce8a4c9f76cc7cc2bda0495c2ea62 SHA-1: e42bdd88c13e53864ed8d1de00709035a8814024 SHA-256: 9269edf2fd2920dcef4ee4fa7eee3e2554bb29f38cac8cf495eb8740b7489b1f
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm for SEO manipulation. One of the primary links redirects to a known malicious infrastructure. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and a URL that likely serves as a lure.

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.link/pify?keyword=introduccion+al+nuevo+testamento+pdf In PDF document text
    • https://gekeforoka.weebly.com/uploads/1/3/1/4/131438206/gimodutip.pdfIn PDF document text
    • https://tedumuwoke.weebly.com/uploads/1/3/1/3/131397970/vozutefirudeji.pdfIn PDF document text
    • https://munujagafunudo.weebly.com/uploads/1/3/0/8/130873736/7176823.pdfIn PDF document text
    • https://benukozememig.weebly.com/uploads/1/3/4/4/134480731/8471686.pdfIn PDF document text
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/5080522.pdfIn PDF document text
    • https://kolivobaka.weebly.com/uploads/1/3/4/5/134500933/29608a36e5.pdfIn PDF document text
    • https://rewemekekebaz.weebly.com/uploads/1/3/1/4/131406535/4202832.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9192/6948/files/dragon_chinese_restaurant_menu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4582/1855/files/metodo_de_investigacion_explicativa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86c60659-5d8a-4335-a606-da90123c3de1/aisc_manual_of_steel_construction_allowable_stress_design_9th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21be6149-5bbc-4735-87bd-cff85a89bfcd/fapasagikaxamedibajewufeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5188/3930/files/gisikozipenenotulijafupa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/0718/9407/files/perineumona_contagiosa_bovina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/6308/6756/files/61187104981.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/excel_vba_print_range.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7859/3943/files/fotugemaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5843/0106/files/6023826503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2192/5543/files/52156612044.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc3f141d-5f4d-4d1f-b90b-dee5ea2135c5/doruxivokejusajulimijo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6329/5646/files/kunekebejalepu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1070/6619/files/wobagipizavavorofipopava.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1397/8291/files/rifalujekorijijifelon.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_off0000e082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE082 5300 bytes
SHA-256: ffec586b513070a3f5aeaa600d7629e37803f8fcc3b076a557b7e2d3ccb1dae5
font_01_sfnt_off0000f277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF277 11744 bytes
SHA-256: f87f2187d462be7c5c7e41623111404760246f3d9341337f687bd636ff56473e

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