Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e30d494e2594fa3…

MALICIOUS

PDF

43.4 KB Created: 2020-11-07 06:35:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: c7f45709a9534ca6340ed113acf315ac SHA-1: 11549eb2170c03429a3c408fac6bf6c282b2671f SHA-256: 4e30d494e2594fa387dc8624b7ad0fe4b03a039cf8c40c3127540b208ed14fb9
132 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with a primary link to 'traffine.ru' that is flagged as a malicious redirector. The document body and heuristics indicate a lure for downloading software, specifically mentioning "utorrent pro apk pc". The presence of numerous links to disposable hosting services further supports a malicious intent to distribute unwanted or harmful software.

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 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://traffine.ru/aws?keyword=utorrent+pro+apk+pc In PDF document text
    • https://gukepofefefika.weebly.com/uploads/1/3/1/4/131437977/nupuvu.pdfIn PDF document text
    • https://fawefugixizim.weebly.com/uploads/1/3/1/3/131383791/vakotivim.pdfIn PDF document text
    • https://fepaxumezo.weebly.com/uploads/1/3/4/3/134320712/burusuwapiresopabi.pdfIn PDF document text
    • https://vezidinudavad.weebly.com/uploads/1/3/4/4/134481570/rilimanupubowuzasin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414358/normal_5f9984e7ebd57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404520/normal_5f92606731b7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426823/normal_5f99656561427.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/752f7997-0bfe-416d-8c4d-7f618715634e/17715758769.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93c837a4-e88f-4ea8-834d-dddb021ad1cd/jotezonizila.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c125a130-1714-4169-92ed-9b110c19be42/kujuzote.pdfIn PDF document text
    • https://pupirod.files.wordpress.com/2020/11/sagob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a72d8e53-2979-4589-ad6c-079e212d3e5c/wuxudigemogovebukafebu.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/plasma_burst_2_hacked_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/atmosphere_air_purifier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f772cd9-790e-4a6a-af6e-be2b2a62af3c/adam_young_golf_videos.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_off00006c0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0C 4772 bytes
SHA-256: d23bc84a3e01562a95ad28144250d823fcd76d9f0f5ae6ee202839eac7c3e0aa
font_01_sfnt_off00007c60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C60 10844 bytes
SHA-256: 6ee41e6858b93547e46017c65dd791b80c00ed7a357e4f8a87beea533c96dc49

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