Malicious PDF — malware analysis report

Static analysis result for SHA-256 8616dd479c383c89…

MALICIOUS

PDF

40.8 KB Created: 2020-11-02 16:06:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: a259bc91e8b5904f3d75b74beef8fe40 SHA-1: d398d1f42837e3b234553eb4639991ab77b6499f SHA-256: 8616dd479c383c89008e1cce3944ffe47428fc13f6c96713942b473b3e265126
174 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. The presence of numerous links and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/strik?keyword=spin+the+black+circle In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367299/normal_5f8e469de3a01.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/kogibak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367271/normal_5f89a04ca9fb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_5f8e895f99c4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367903/normal_5f9c9f0cb66a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404727/normal_5f9835f8162a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369173/normal_5f9f667d67268.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/e164e6eb-767f-430f-b2f6-7bcc7b220617/56882531567.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9114/1801/files/propiedades_y_beneficios_de_la_moringa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92b21117-639b-4387-b7e1-41da1b724d87/summary_the_storm_by_kate_chopin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff02550e-5853-4a3e-8dc3-83ac24e81b82/89761801720.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af4737b1-9d51-4adc-b164-04f2349f6215/amor_de_mi_vida_maluma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ff4ec3a-3e26-4fea-92c7-89ff439cafdb/sibusuzobugivofijiwip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e12a8ae0-523b-4902-a57e-67db6340c494/42854422515.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61CB 5152 bytes
SHA-256: 62c6fbe0bd205c71d1c0fad968cc737bf43b8682465d650c19f124341e1fcdb4
font_01_sfnt_off00007347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7347 10320 bytes
SHA-256: f30fbbea89fc3259e776cb55de77c5c7aa997a19ff367b676e15cf33cf713c46

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