Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7129e05655683d9…

MALICIOUS

PDF

50.0 KB Created: 2020-10-16 10:01:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e9f905df572f7fce923fbfd3c90217b1 SHA-1: 694cdb936bf657e22abc1eda248c0b315ebb16ee SHA-256: c7129e05655683d9c0d4459f5b6f15069e76dd49a3d933e9a1b2bca70b57ad88
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for downloading hypnosis and accelerated learning materials. The presence of numerous external links, many pointing to PDFs, suggests a link farm or SEO manipulation tactic to drive traffic to malicious 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://cctraff.ru/strik?keyword=hypnosis+and+accelerated+learning+pdf+free+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f8728c26856e.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/gosibokuvefuj.pdfIn PDF document text
    • https://lulitetuxopibol.weebly.com/uploads/1/3/1/1/131164377/2002594.pdfIn PDF document text
    • https://gemenudotipetal.weebly.com/uploads/1/3/2/6/132695720/8c5bff6809a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bd0c6d4-82c5-44f8-ba90-89593ac3475b/fugemibogipiwadosezalof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b82d29e-8617-4d09-b6cd-bfed9603aa31/19964378390.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5ee2a9b-2a30-4a5d-8c85-f2ec6ac2752b/3578515200.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/1509/4439/files/22741918451.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5949/2517/files/sauder_shoal_creek_desk_assembly_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5844/8534/files/gelowadexutotawe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/7529/1286/files/30911468956.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2804/4698/files/31566052310.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9fe1fd6-7d5e-422a-a879-7fb3824b9bc6/37586303914.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e3da7a6-beda-4c5b-a96d-85d0d0ae0b25/97731993933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/495c6043-60ed-43f9-96ff-57a1f6f408f0/fajox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be5d8cae-1966-4d24-b70b-47ccad620ffa/92376592008.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de8eed64-10bd-4299-8ef4-9f516a7d0782/66528355462.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0643fcd1-975b-4007-9744-79b2eac562f3/vajuluwonixokelovugizeb.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_off0000852a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x852A 5476 bytes
SHA-256: a330d7e8581ecd6c07244beb60f851b22b6bb47d990a5943cf8b2c0d10eb5d52
font_01_sfnt_off000097e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97E9 10060 bytes
SHA-256: f18c5adaceb056635c4aa6e40a6554629241c1e09800a8f4fdf94eae6806e6bf

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