Malicious PDF — malware analysis report

Static analysis result for SHA-256 d13bfa49ad27deca…

MALICIOUS

PDF

46.8 KB Created: 2020-10-27 17:42:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f0ffbd4b2d035b2b7a8f7c4afee8422e SHA-1: 9b66a3acee6e2acf33e552306da11c94b25f73b9 SHA-256: d13bfa49ad27deca5c81fae2d2af70b3b3c5dc22ff9ff9b0d48d9409331caa45
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to benign-looking documents hosted on cloud storage and e-commerce platforms. However, one critical heuristic firing indicates a link to a known malicious redirector, `https://ttraff.club/123?keyword=neutrogena+french+milled+soap+bar+ingredients`. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious infrastructure, likely for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

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=neutrogena+french+milled+soap+bar+ingredients In PDF document text
    • https://tadeganerusoza.weebly.com/uploads/1/3/1/4/131438541/ximaboriti-panojoxa.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/sugikubuwova-gogovulerep-mufapifuvel-rurimul.pdfIn PDF document text
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/8805769.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/vasewopufipu-vunarunutobobo.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/gaxuremewuger/mekewoxunolu.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/angular_7_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/kigusopixejepalonitifojun.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/abcd_chart_pattern.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6898/3969/files/seven_steps_of_research_process.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4116/3926/files/escudo_de_honduras_dibujo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2044/3045/files/motiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/8247/9284/files/ipu_bba_syllabus_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8494/6850/files/43355340304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0087/5173/files/medline_remedy_skin_repair_cream_with_phytoplex.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/certificado_medico_prenupcial_estado_de_mexico.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/bautagebuch_411.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/fusikizapusebizimejejap.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/rpa_automation_anywhere_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/joint_stock_company_accounts.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/calculista_de_estructuras_simon_goldenhorn_gratis.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_off00007525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7525 5680 bytes
SHA-256: 54920922a2a8d7c21ec74d9255c5ab83791fe76a12cf915d9d7b3df7f7fe6a03
font_01_sfnt_off0000884d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x884D 10972 bytes
SHA-256: 96b58b537c494920412a3473a803e09479bf0ed670cee128271e12f7a0aee7d2

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