Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f8959229d989573…

MALICIOUS

PDF

47.9 KB Created: 2020-11-01 16:21:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: ae68bf3e90099bc3c0cca440557c14e1 SHA-1: dbb2e0d628506011f5b95184a5aa585cc8c8d8ae SHA-256: 3f8959229d9895734dd8be4bd06a4be3518b7083f2bb5b709cced2eff83c1f2c
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://ttraff.link/123?keyword=planets+in+order+from+the+sun%252Bmnemonic In PDF document text
    • https://vewusijonaw.weebly.com/uploads/1/3/4/4/134489037/7a43c2fe970.pdfIn PDF document text
    • https://remewizefo.weebly.com/uploads/1/3/1/8/131856163/6886ed495f.pdfIn PDF document text
    • https://desaviguwogo.weebly.com/uploads/1/3/1/8/131871994/risufidu.pdfIn PDF document text
    • https://xazapadikud.weebly.com/uploads/1/3/1/8/131871762/546312.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401545/normal_5f9518b242746.pdfIn PDF document text
    • https://mulelene.weebly.com/uploads/1/3/4/4/134440938/6108725.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375071/normal_5f8a89c79ecfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380395/normal_5f93d0927f2eb.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/1/0434/1651/8805/files/revejusezazelobejitumi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/754184fd-9f99-4e79-aa66-64cbab4568a9/google_display_exam_answers_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5094/0608/files/nujixubaregizinadeberim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be9dfcc3-8d04-484c-9d2e-fad027c15380/drake_ft_lil_wayne_marvins_room_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/1655/8024/files/fibinepoxata.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/3681/6545/files/pathfinder_alchemy_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2745/0014/files/29781209680.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_off00007ce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE3 5260 bytes
SHA-256: 4d646ad02efdc89858106dabad98319241c22909e1f111d43500a7a22192d922
font_01_sfnt_off00008e9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E9D 10388 bytes
SHA-256: c0dc03bd23be5793d3278c6bde4ede428eb13cf70056322ac6be2b44eb86e66d

Open this report in the interactive analyzer, or submit your own file for analysis.