Malicious PDF — malware analysis report

Static analysis result for SHA-256 14d3c114d5626179…

MALICIOUS

PDF

53.0 KB Created: 2020-10-05 21:09:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f305591ad36eadd20fa51d2c78d10640 SHA-1: f41a17dc81aee2af66723523857956bf625af64f SHA-256: 14d3c114d5626179664a133ea11e34e0e0fb59cee87dbb8996284cdfe2d5a825
124 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically a URL associated with a Porsche buyers guide lure. The ML classifier strongly flagged this PDF as malicious, and the heuristic rules indicate it's a redirector link and part of a link farm on disposable hosting. While no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to drive traffic to malicious sites, likely for phishing or malware delivery.

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 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://cctraff.ru/strik?keyword=porsche+cayman+buyers+guide In PDF document text
    • http://xunus.culligandesignandtype.com/uploads/1/3/1/3/131383562/sazit-gebadadof-tomewag-zulime.pdfIn PDF document text
    • http://files.sehjournal.com/uploads/1/3/0/9/130969811/nofekajanipivi.pdfIn PDF document text
    • http://files.kgaglophotography.com/uploads/1/3/1/4/131453631/1325721.pdfIn PDF document text
    • http://jagon.the-joy-of-syntax.com/uploads/1/3/0/7/130776133/tutewoboboturogiv.pdfIn PDF document text
    • https://site-1037283.mozfiles.com/files/1037283/13831909483.pdfIn PDF document text
    • https://site-1040299.mozfiles.com/files/1040299/repodekav.pdfIn PDF document text
    • https://site-1042657.mozfiles.com/files/1042657/15570293234.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/0e8ded97-3699-4802-985c-eda27549b6cd/20572307161.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e0a59bd-04d0-4831-9cfc-54b6bad1e2d6/40295517028.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb4ab28f-10a0-4d54-b0ef-41c7fed0061f/gemopizede.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_off000090cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90CB 5564 bytes
SHA-256: 73c7a467ffc50a85cec4fa82625e07332c262b4491da6632e5cc54b3ad34ab47
font_01_sfnt_off0000a395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA395 10460 bytes
SHA-256: a01d6fe3fe5f4509bf04194c898c53258b22e0f0a2409f07d96e3b158be1cdb1

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