Malicious PDF — malware analysis report

Static analysis result for SHA-256 171d144108dad806…

MALICIOUS

PDF

41.1 KB Created: 2020-11-02 03:30:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f70c35d11322085619379b147e4dd9d6 SHA-1: 00c5cde95fbb6c1f5311eaf1da00ee27fe87eeb7 SHA-256: 171d144108dad8062efef1568b526bf9ed338295f61573508e04fed5b0880cf4
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://ttraff.me/123?keyword=life+cycle+of+dragonfly+uk. It also exhibits characteristics of a PDF link farm, embedding numerous external PDF links, many of which are hosted on platforms like strikinglycdn.com and weebly.com. The document body, though heavily obfuscated, contains references to these URLs, suggesting an attempt to drive traffic to malicious sites.

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.me/123?keyword=life+cycle+of+dragonfly+uk In PDF document text
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/kepenu-likilaxi-wanerojitofetaw.pdfIn PDF document text
    • https://xakekulipekez.weebly.com/uploads/1/3/4/3/134350488/35daaec12f3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371799/normal_5f96a1ae627a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370078/normal_5f883d6cbb48c.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/9a9670c0-16f3-4413-bf59-b6dc22f6b4c5/go_math_grade_1_teacher_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10af9d78-275f-4258-8885-6041876e72e8/stardew_valley_harvest_with_scythe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6bf5b0c-cc5a-4988-a23d-94de57c7587c/rikadovusukifusekusesu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/324b7695-1e74-4c4f-99cd-577532b00b7a/84991422485.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99f69dc2-3973-4b57-a9dc-cf97696b51b2/1090874294.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/wokegizanevikem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59dc0dbb-1235-4d47-a40e-cfa78e828f92/vunupuzidonutupasos.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/novel_battle_through_the_heavens_bahasa_indonesia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/0236/9442/files/minavalepedetakas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/472da49a-f3a7-4774-bf94-43e8f08b18a3/tiwumetijurifo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7793/1686/files/lol_mundo_top_guide.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_off000064c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C1 5116 bytes
SHA-256: 821f3e7d09c4784745752bb7048ac2f7a7651f2d46b6682ed5adeca4948bf366
font_01_sfnt_off0000764b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x764B 9760 bytes
SHA-256: 0dbc736ed34e5349f8c1c6752552b773e3e1e1c228532acc213141169d255227

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