Malicious PDF — malware analysis report

Static analysis result for SHA-256 420ec9a39ae21f7a…

MALICIOUS

PDF

48.5 KB Created: 2020-10-27 07:41:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 069cdc63167a2740a156a7e0d9a1d96a SHA-1: e9f289dc8b721111d5b6abe76f6b650259caaf62 SHA-256: 420ec9a39ae21f7a343147aac7db2c37c195d60df367d6a9d686ba246c9e2e87
154 Risk Score

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://ggtraff.ru/strik?keyword=bad+luck+and+trouble+book In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368466/normal_5f8908cb0a070.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365567/normal_5f956dbd5160f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404107/normal_5f9782b2243e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386618/normal_5f8e5d3b9e5e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368226/normal_5f8e578a31372.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/1803c2f9-3f00-46c6-80b8-f5b68e81847e/final_fantasy_tactics_a2_rom_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78d230b0-4af8-46ad-8932-43d5490f4546/roku_express_3700_vs_3900.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2c53e6c-a08c-486a-8af7-3cf4b630322c/goblin_sub_espaol_descargar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6750c463-3cef-4b2a-885d-6bfa9f4f195f/xagagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fef2e168-6a13-48e3-be87-cee1870e83c4/protista_crossword_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d9bf7e5-dac4-451c-8223-cd2595f5adca/94454781308.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40e3f0a0-437e-4358-943d-65c21f29e489/daragimis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55b78426-b056-4abe-aab6-f1471a7c251f/utopia_for_realists.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23388903-84b4-44b6-895b-dafe7fdc3afe/vuninemezolevobes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2331/0260/files/xebekulewidaxatifinuzivo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/2854/7237/files/experimenting_with_babies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2536/6165/files/zexumekamexomazotemoje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7368/3100/files/70184902713.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9163/1524/files/43826415346.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5794/6530/files/plt_study_guide_7_12.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8021/3170/files/46906336542.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8256/6811/files/20377615744.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_off00007126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7126 4840 bytes
SHA-256: 56f44e1ec1c77a3161731b30ec890c615f0af6b184c4562568afd53cb9f587ab
font_01_sfnt_off00008199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8199 11076 bytes
SHA-256: 2970522e82760465a63ce7336f646d23ac290af00d69a5c71f618129728eb64f
font_02_sfnt_off0000a689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA689 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333