Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d602ebd0142d57b…

MALICIOUS

PDF

56.3 KB Created: 2020-10-16 23:45:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8bfcdcba9f0d76375213d477c587641e SHA-1: 2c30e92000d21f0ace0f55e736b51d01d42223f5 SHA-256: 8d602ebd0142d57b84ee4d49fca7ebaf968c045f7499de90f060e42ab0cecda7
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 pointing to external PDF files hosted on Weebly, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful sites.

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://gettraff.ru/123?keyword=bolt+head+size+chart+pdf In PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/8980310.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/kolitasukepejud.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/divili_dapixi.pdfIn PDF document text
    • https://xumogimunosu.weebly.com/uploads/1/3/1/6/131607683/0babbd86b6994.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/2c5e263e815.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/1/0437/7778/6018/files/tusepeliv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9546/7195/files/diabetes_mellitus_tipo_2_oms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3358/1462/files/posufikojaxelezujinepipe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9512/4887/files/pokemon_dragon_majesty_premium_powers_collection.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0730/2037/files/36020279673.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7537/1159/files/osha_scaffolding_requirements.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0395/5360/files/mental_hospital_eb_2_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43b0a716-0920-47e4-a44e-0bb39935b511/17139765065.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eee2d572-cec7-4470-8ccb-ad6116549b05/99255289806.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acbac8c1-ab33-44b7-a79e-6f3e234bdc85/49471983580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ef7e8cf-27f2-4011-9716-0737284284d7/51089063197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad536c73-9f1c-4d82-a1d2-0fd73bd9214a/72358430178.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdab5de4-e81d-4b96-90a7-2d4d3e671bb2/jobimetenusidupewupexiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11b3082f-3a30-4c2f-a1ab-adb86765444e/91191456315.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08382a3e-c10d-4e37-b1dc-a5bcfa7c4a8b/wogiwalinejabivafuda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8d75480-67a6-440a-aab1-3a8c1af2cd47/kijelolu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0d5a786-c861-4d3a-9065-bb1506e9bab0/vuninulegorapere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fde99224-59a4-4c93-b653-3f5498cf7a19/pifuvugegiruk.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_off000091ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91AE 5344 bytes
SHA-256: 7a4a59b2a6c069310eae180151f75b9f4914e50f21bfc7be95e513493f1e8b3e
font_01_sfnt_off0000a3dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3DD 15224 bytes
SHA-256: b825284d4fbfe3a845d76d3a0295efeeb993a00fc969f2b651b601c9f6b9b855

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