Malicious PDF — malware analysis report

Static analysis result for SHA-256 df6bf3c193daacf4…

MALICIOUS

PDF

44.5 KB Created: 2020-10-29 05:19:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0088bc2536c50985ca2051e9344af348 SHA-1: 252428ffeb14d90bd7d8637f88147dcf576ade70 SHA-256: df6bf3c193daacf4380fdd0a4b6aec8e4f22ca27b199f606a46619967f96ad3f
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, functioning as a link farm. One of these links, 'https://ttraff.link/pify?keyword=2008+hyundai+accent+manual+transmission+fluid', is identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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/pify?keyword=2008+hyundai+accent+manual+transmission+fluid In PDF document text
    • https://sedifuwenute.weebly.com/uploads/1/3/4/4/134464273/zezozajulazetes.pdfIn PDF document text
    • https://pebiname.weebly.com/uploads/1/3/1/4/131453048/dumepa-vomunedojaxov-nofeza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411479/normal_5f97580e10b6e.pdfIn PDF document text
    • https://jewajufigojoxi.weebly.com/uploads/1/3/1/4/131438211/dofaruladaxanokaviti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366357/normal_5f8753ecca9f0.pdfIn PDF document text
    • https://bitekiparoduj.weebly.com/uploads/1/3/4/0/134017536/xolapon_noduwimujesar.pdfIn PDF document text
    • https://jaketomerinojox.weebly.com/uploads/1/3/4/1/134109184/gosuwagelititiveme.pdfIn PDF document text
    • https://tugajepefur.weebly.com/uploads/1/3/1/4/131453805/dc40370d2f.pdfIn PDF document text
    • https://xexegetogud.weebly.com/uploads/1/3/4/3/134375989/zivadi.pdfIn PDF document text
    • https://xemupawiked.weebly.com/uploads/1/3/4/3/134321325/902667.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/kizerapu.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/f1b733a4-57f5-41c0-a443-c005765c442c/finujibedewoxisibekirejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6802/5751/files/govoburabade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2562/4988/files/lego_minecraft_iron_golem_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b5a4370-75e5-4183-9b41-8eac4992d720/gilegisekexobudewezeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36614d39-5679-422e-82b0-0b97f967a1cb/21611835931.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/2036/0086/files/lessons_in_the_pursuit_of_excellence.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6383/5814/files/energizer_battery_charger_chcc-a_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5319/4152/files/nikaah_mp3_song_wapking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06c1bfc0-2da5-4d5b-8b4e-123234b0734e/9324078646.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7b3ebe1-4a9f-45f5-8556-cfe09426580a/vawunesatenosenoxi.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_off00006e58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E58 5736 bytes
SHA-256: 076fb107984c708cbb92d3fe242d9d04c60b9325bc36ec76120fa28a49a81b5b
font_01_sfnt_off000081b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81B7 10156 bytes
SHA-256: b668020b05d7195be491024dae273e3704c095da31e22de14a84d2d75651bc2b