Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dd1cd067793b712…

MALICIOUS

PDF

38.6 KB Created: 2020-11-02 18:07:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 742297688fcddc26f182249a5c09e019 SHA-1: de7f17d9e6630b1c6886fec6135cb118493149e1 SHA-256: 1dd1cd067793b7127d245ea9e558546556acf714e8dd5ab6cbd125754e358c18
124 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains URLs that appear to be part of a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

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://ggtraff.ru/aws?keyword=toshiba+tv+43l420u+manual In PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/xejofereg.pdfIn PDF document text
    • https://seforurusux.weebly.com/uploads/1/3/4/1/134131879/45255138.pdfIn PDF document text
    • https://najunores.weebly.com/uploads/1/3/4/3/134381484/xukidupevigon-kiviti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379473/normal_5f998b64942ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383929/normal_5f8e6b9565113.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/rugatu-rugot.pdfIn PDF document text
    • https://worobewunit.weebly.com/uploads/1/3/1/4/131406731/pagaforuxew_wenapupadunul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tuzamada/76930054677.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/39897519316.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb5e1943-4d86-4ae1-badc-6e0a5cc32b0d/96049438907.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/auditing_and_assurance_services_eilifsen.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/viwetitukelapuguz.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/mepikeliwuzalelonife.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/dragon_genetics_lab_principles_of_mendelian_genetics_question_answers.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_off0000574d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x574D 5504 bytes
SHA-256: 87a212084d30513a6824a42123634599a40dedbf786d9c93803b6070bb3b100d
font_01_sfnt_off000069eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69EB 10632 bytes
SHA-256: c1c53445a9e3a60b0a235e6b36e0764de94deefe99fe85f47e29d9f67902331e

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