Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae3dbef420132639…

MALICIOUS

PDF

44.8 KB Created: 2020-11-02 19:26:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0737cf31382567495d7d85280c234d50 SHA-1: 876161c6040f66854bb77409468a30125b1cb913 SHA-256: ae3dbef42013263916f60a173c936f685717781d98b7dc8c8ede30c8d9e8a3a0
172 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, 'https://ttraff.link/123?keyword=urine+therapy+testimonials+2018', which is a strong indicator of malicious intent. The document also exhibits characteristics of a link farm on disposable hosting and includes a lure for remote support tools, suggesting a multi-stage attack or social engineering attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious workflow designed to lead the user to harmful content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=urine+therapy+testimonials+2018 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365553/normal_5f8b40a0ab5b6.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/xekena.pdfIn PDF document text
    • https://moviwinexanasi.weebly.com/uploads/1/3/4/3/134314602/soxaju-tuxekin.pdfIn PDF document text
    • https://butebipibib.weebly.com/uploads/1/3/4/2/134265815/1923462.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/cc0b5212d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367278/normal_5f8763691199a.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/latumale-winilig.pdfIn PDF document text
    • https://zazivepug.weebly.com/uploads/1/3/4/3/134359823/4ef5b8856.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/30a3cfd3-a5af-44cd-8474-87d8285b24fa/service_manual_fiat_500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9119/2728/files/acr_contrast_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc5739c7-8e38-45ed-bc0e-945c67262447/domivaporaximisunifite.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/1103/5295/files/rorozoxorupepalola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/4654/0707/files/50884178605.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_off00006f5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5C 5672 bytes
SHA-256: 2abe8a50b2e2ed5e0085401b6f869d3cb68f27a5c4595487e93d6e9eb9e5210a
font_01_sfnt_off00008282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8282 10408 bytes
SHA-256: dc0e8e5f0f4833bef11ee4b7914fe06c186e3e22b9aeea3f96aff387f2afd9cb

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