Malicious PDF — malware analysis report

Static analysis result for SHA-256 29f248beb9185115…

MALICIOUS

PDF

45.3 KB Created: 2020-10-05 08:44:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4d8053078dbcc8ba7494f2d9ecfd4533 SHA-1: f64b1a5fbcf558c8995936bbd3fd1857c83b0fc3 SHA-256: 29f248beb9185115ef74ebf8f6dabfc1c5f3466f2977cc1e4ff4b88f8b8a6537
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 external PDF files, indicating a link farm for SEO manipulation. One of the primary links redirects to a known malicious URL, ggtraff.ru, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains the malicious URL, suggesting an attempt to lure users into clicking it under the guise of providing information.

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/strik?keyword=japanese+guidelines+pancreatic+cancer In PDF document text
    • http://files.bossladycharity.com/uploads/1/3/1/6/131606819/9446722.pdfIn PDF document text
    • http://files.findyourporch.com/uploads/1/3/0/7/130776267/tifen.pdfIn PDF document text
    • http://patutumur.tuttlelibrary.org/uploads/1/3/2/8/132814930/jibubeloridiluwiter.pdfIn PDF document text
    • http://winat.kellysserenityhouseinc.com/uploads/1/3/2/6/132680981/df7829f43.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/cee6e701-b5c6-4f4b-8725-b81661a29985/68496522166.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad4d43ab-af6f-4374-b6fc-62ca5cdca0ca/49399003198.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad36c0e6-4429-4598-97d3-d2ccb21eac2f/48791607339.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a795b897-ac15-4b18-9606-241abae55111/65687872024.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/alianzas_claves_modelo_canvas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8625/9391/files/rogitodurorozuworabo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2148/7256/files/53773412328.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8719/5032/files/statics_and_mechanics_of_materials_3rd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6172/2788/files/37806286297.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6972/5082/files/leavitt_high_school_craft_fair_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0342/0570/files/44th_city_bus_schedule_watertown_ny.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_off000072f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72F6 5232 bytes
SHA-256: 9e11ec17a0707aed3064a222f85f2f53399ffabddc5e38ecb34e8993cbe25b72
font_01_sfnt_off000084ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84CE 10372 bytes
SHA-256: 813a129e3af372da0fc6fc61393baf8bb02612b5c6452eb215669e449b8720e5

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