Malicious PDF — malware analysis report

Static analysis result for SHA-256 bff84d6a9234df4d…

MALICIOUS

PDF

47.6 KB Created: 2020-10-27 18:56:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 53344f5a7780c148e865d4e59aaa1b58 SHA-1: ab2fc828d898e14decb9b4206d2c1c359ec95d1c SHA-256: bff84d6a9234df4dd13c28eb3f84311f32eb555f6d03938fd8a539937fda6f60
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.club/123?keyword=minecraft+gray+dye+recipe', is flagged as a malicious redirector. The document also exhibits characteristics of a link farm, with numerous external PDF links, suggesting an attempt to drive traffic to potentially malicious or spam content. The ML classifier strongly indicates maliciousness.

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=minecraft+gray+dye+recipe In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365638/normal_5f86ff9d65dac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369519/normal_5f8f3bd0829ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380540/normal_5f8c94e16b6de.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zamuriza/51653030663.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/solamente_una_vez_agustin_lara.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/66706517855.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/paleo_diet_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/77050295683.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/001d4525-f815-4309-9caa-f2c04ee3defc/rawopekijevo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0d2bede-20b7-49a0-9986-9264c4c6c164/16880962375.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4caf5c1-0e5b-43ce-a0e8-202904a32444/61200683589.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8340/2909/files/cbse_2020_date_sheet_class_12.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4774/5198/files/parasite_1982_parents_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/0601/7692/files/vesobis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1682/1157/files/tumiteki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7795/9325/files/sufiminuvurifamujesu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/047d85d3-8af2-40ad-b4b6-d76818a56436/kowaveguri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b11976ef-cc3f-4bda-a94e-543b1748630b/42942441306.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/105507b2-c21f-4e77-a7b0-86afb71f758f/36178339338.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/poroneja.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/castrol_edge_professional_c4_5w-_30.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/compelled_by_love.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/dahua_catalog_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/adjectives_versus_adverbs.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_off00006d39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D39 3460 bytes
SHA-256: e3d829574e28fd4cfe2fb213d766bbd3f3fa3731f7609d9a1aed315244bc13b4
font_01_sfnt_off00007974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7974 5220 bytes
SHA-256: 8e6b871dd0fae5e57a1de972145b106162cbf1847d9e1c2ca67a4de677bb545d
font_02_sfnt_off00008b4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B4D 11176 bytes
SHA-256: f764d890f45155c9be89c07ee43527016fd0173e8532f6956623415e953e2b07