Malicious PDF — malware analysis report

Static analysis result for SHA-256 97dd2f9d24554be3…

MALICIOUS

PDF

39.6 KB Created: 2020-10-29 23:59:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 71b9cda0737c1cc0c19d60d1c1a7fdf5 SHA-1: d0cd22d1e7448332ba03bff0a6d30d50d74e38bb SHA-256: 97dd2f9d24554be33609fe2ab8874a3002acafd26f7a52d199defd0291fe66de
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 potentially malicious redirector infrastructure like 'ggtraff.ru'. The document body, though obfuscated, contains references to a 'medication label worksheet' and the malicious URL, suggesting a lure to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the presence of numerous external links supports a link farm or phishing attack pattern.

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://ggtraff.ru/aws?keyword=medication+label+worksheet In PDF document text
    • https://subefurova.weebly.com/uploads/1/3/4/5/134505332/wutus_kawumawono.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369316/normal_5f922a21238e4.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/1/0266/9117/4584/files/roller_burnishing_process.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/1853/9948/files/solve_rational_equations_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a747d2a-d2a8-4542-ab9e-7a80c72e0535/71881200972.pdfIn PDF document text
    • https://s3.amazonaws.com/zokokamu/virginia_real_id_appointment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/953762b5-27a0-411c-bb5d-19c79e649ea4/1974445527.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4621/3544/files/jatenivazanabuloji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5195/3557/files/range_rover_sport_2020_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7122/3980/files/posevilisedepezovejovaj.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_off00005c4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C4A 5328 bytes
SHA-256: 748b269f2c2c21db269c7479c8d87c7ad4df46016e7355b548cc08a58f6ad33c
font_01_sfnt_off00006e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7B 10420 bytes
SHA-256: bdb793f211e8d61dc625710017f8d67e53e1ce537ab877c3b48132550375393f

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