Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc906ea7dfb93845…

MALICIOUS

PDF

40.2 KB Created: 2020-11-06 01:21:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 057855a1c65226aeb6f24fa274049797 SHA-1: 3081672dab678a5ea92a542a7e6c48c5178192ef SHA-256: cc906ea7dfb9384509aebe37f017447db38a403550bbf05d6b4b9fa6f79255b0
154 Risk Score

Malware Insights

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

The PDF file contains embedded links that point to a known malicious redirector. The document body, though heavily obfuscated, appears to contain the same malicious URL. The presence of numerous links to external PDF files suggests a link farm or SEO manipulation tactic, likely to obscure the primary malicious destination.

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/wb?keyword=drake%20josh%20peruvian%20puff%20pepper%20wiki In PDF document text
    • https://zuzagidebosoxe.weebly.com/uploads/1/3/4/3/134391670/ce269dad.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/xovom-miramet-puvaz-tefot.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/f07fe65e-3a23-4d0b-827e-fdd28f0a8bf5/60795978550.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd9b87dd-b214-49fd-8560-4730d63ab4f0/16305674006.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/sizoz.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/57566005024.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aadc2b7-7d23-4338-a649-69dc0985f6c5/koxukelagugigutodaxoludox.pdfIn PDF document text
    • https://s3.amazonaws.com/waxejajinigafu/neil_postman_the_disappearance_of_childhood.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a3e6fb8-cb0a-4cef-a318-a83a176f779b/76689354038.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/33499500654.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c7ef283-8e6d-45b4-a02a-3c4fdec7d4ab/38307246056.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38a38be0-5e3f-4ba6-a210-28e0ca1695fa/ejercicios_para_trabajar_segmentacion_de_palabras.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b72c2e04-070b-43a2-956c-0b10ee0e19e3/gukizagelugesorevafikij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16093c32-f4b2-42c4-a75b-fc22deb9a293/72615585583.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b7f449e-7b85-48ec-9cdb-2a9577ae223e/rezewojopafas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c4a9a72-dc41-40a2-a6b2-35f440e1e51f/jovavanos.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_off00005fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC2 5248 bytes
SHA-256: 12004595bbebac9ee0b64275523879b8a0a3eeada15cf9b0728fa7d334bfc644
font_01_sfnt_off000071b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71B5 10004 bytes
SHA-256: dacc48d495d639df6902921091ae6c2beaf691d5153b71148474204334cc9ca6

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