Malicious PDF — malware analysis report

Static analysis result for SHA-256 066f1869e0dad27b…

MALICIOUS

PDF

37.8 KB Created: 2020-10-29 23:39:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 31cec661471ddf6d336018c80fc26413 SHA-1: 031455ccedb3c03b5f1de6c1acb2c44edc50472a SHA-256: 066f1869e0dad27b3d8e4c7424d5bb5d3c15af7b15a10488ad2cdfb2688d5651
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by an ML classifier and contains numerous embedded links. One of these links points to a known malicious redirector, suggesting an attempt to lure the user to a harmful site. The presence of a mass of external PDF links further indicates a potential SEO poisoning or link farm strategy to distribute malicious content.

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/aws?keyword=r134a+refrigerant+30+lb In PDF document text
    • https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/a4f2d0.pdfIn PDF document text
    • https://gejatovuri.weebly.com/uploads/1/3/1/4/131406669/8ecf3225f90.pdfIn PDF document text
    • https://xojisige.weebly.com/uploads/1/3/1/6/131637148/4713989.pdfIn PDF document text
    • https://jinezosibe.weebly.com/uploads/1/3/4/4/134454760/8498155.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5591/2862/files/agudas_llanas_esdrujulas_4_primaria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5196672c-98cd-48f4-9881-bd6848bc8fd3/11997843514.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22c77b4f-3f90-4518-9351-943b56391d11/gojumururuvavexewejuzox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3f13b18-aa87-4752-b3da-ba7f3d133589/12529454369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/4147/9578/files/21330176557.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/0567/4133/files/blank_united_states_map_printable_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7025/1702/files/aha_cholesterol_guidelines_ppt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9903/6058/files/4665583143.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7236/3432/files/49556956296.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6912/6853/files/patarer.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4885 5028 bytes
SHA-256: 23bacb78cb148f649940f33748adab0dd9a745398974450db90b5d5fab7a42a9
font_01_sfnt_off000059a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59A6 10116 bytes
SHA-256: dba66cacdf51a6eb1f63a79c4838546404802111f9a969ea5d3a30a02ab28460
font_02_sfnt_off00007c3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C3E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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