Malicious PDF — malware analysis report

Static analysis result for SHA-256 6defb38c16cbdd6c…

MALICIOUS

PDF

33.2 KB Created: 2020-10-05 17:57:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c5cbbe8c4c0a53a32ec54f21e1db20da SHA-1: 10a9e505e47b429f4ba5112e442cf0cb67e93304 SHA-256: 6defb38c16cbdd6c3c797554eac02ee29eb71cd3ffe64f490d32e285601fd240
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by a machine learning classifier as malicious and contains numerous embedded URLs. One URL, 'https://ttraff.me/pify?keyword=sylvania+led+light+flute', points to known malicious redirector infrastructure. The document appears to be a link farm hosted on disposable domains, designed to lead users to potentially harmful content.

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://ttraff.me/pify?keyword=sylvania+led+light+flute In PDF document text
    • https://site-1036775.mozfiles.com/files/1036775/bagabogof.pdfIn PDF document text
    • https://site-1036772.mozfiles.com/files/1036772/jibekenufoxejubugofijodo.pdfIn PDF document text
    • https://site-1036910.mozfiles.com/files/1036910/pilugagezemikijozoromone.pdfIn PDF document text
    • https://site-1042191.mozfiles.com/files/1042191/43663746129.pdfIn PDF document text
    • http://safadop.procleanrexburg.com/uploads/1/3/2/6/132682006/3f927d.pdfIn PDF document text
    • http://files.quebecmusiccompetition.com/uploads/1/3/1/4/131482853/2036771.pdfIn PDF document text
    • https://site-1037157.mozfiles.com/files/1037157/90061145140.pdfIn PDF document text
    • https://site-1037176.mozfiles.com/files/1037176/tefujebazibi.pdfIn PDF document text
    • https://site-1043600.mozfiles.com/files/1043600/43979058119.pdfIn PDF document text
    • https://site-1038478.mozfiles.com/files/1038478/72300556418.pdfIn PDF document text
    • https://site-1036633.mozfiles.com/files/1036633/37534730971.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/effedd68-38d3-4a7f-a5b7-650e16589a67/92436583272.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b259f4e-d89b-4b93-82e2-46c32f0ee03b/61618694837.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b3a92cf-fcab-4970-96cd-274a00d45b25/4371559254.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23423bb1-0bf0-4e80-a789-dc91dfbfaa23/lisovazeraxer.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_off00004526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4526 5160 bytes
SHA-256: 926f88ebe0d8daccd71838b5545d1ff72956657284d81a972c98f6c5c27af669
font_01_sfnt_off000056c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56C5 9736 bytes
SHA-256: 11b2afc546765585bf6753d8e4b152e2a22d7229c26ed15190b68a6546d32b07

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