Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1d0bbf7097431cf…

MALICIOUS

PDF

49.3 KB Created: 2020-11-03 13:41:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 2fc14949fa401135eac7e0ea4898866a SHA-1: 3ace53b66d23462529b2e45dbe94eeba4d1d374f SHA-256: d1d0bbf7097431cfa3f11f041b96374243e0cc1e0676bb2c190f566cc201f085
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector and another for a link farm. The document body includes text and URLs that appear to be SEO-optimized content, directing users to potentially malicious sites like https://cctraff.ru/strik?keyword=asee+robotics+competition+2020 and https://moguvikob.weebly.com/uploads/1/3/0/8/130874292/ec5a3e4cb324a.pdf. This suggests a campaign to drive traffic to malicious infrastructure, possibly for phishing or malware distribution.

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://cctraff.ru/strik?keyword=asee+robotics+competition+2020 In PDF document text
    • https://moguvikob.weebly.com/uploads/1/3/0/8/130874292/ec5a3e4cb324a.pdfIn PDF document text
    • https://gupugeja.weebly.com/uploads/1/3/4/2/134235999/e8b3984e2ef2.pdfIn PDF document text
    • https://davobudo.weebly.com/uploads/1/3/4/4/134432622/1081a0885.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379380/normal_5f8b65b13e136.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376858/normal_5f8ca9688e00d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390057/normal_5fa1022ec4859.pdfIn PDF document text
    • https://tefuxaforubexo.weebly.com/uploads/1/3/4/4/134446539/377774.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/f98c42ea-62c6-46c4-99fb-4d02d06e7288/82958124884.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/54372341066.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/009cb2d1-a8d7-4462-9692-688ecf0bb101/52736329703.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b944b10-ddd9-407b-9a49-7c3f999bea7b/936320669.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/victorian_windows_that_will_not_open.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3750b44b-d9ab-4091-941a-68c4a5e43dcd/age_of_empires_2_trke_indir.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0A 5544 bytes
SHA-256: b4ef7c225d2c6583580d0f36f8f3fee0d8961020f098dc3044144641b83edd5e
font_01_sfnt_off00008038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8038 5240 bytes
SHA-256: 8bc970ab42490af8a43d9af7110c1c1927ef58ee0fc62383d098bc44890c9028
font_02_sfnt_off000091f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91F4 11292 bytes
SHA-256: f725c4e3ff959126111a5c2eb34dacdae8e901a36e458afb78451a2294744d0a

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