Malicious PDF — malware analysis report

Static analysis result for SHA-256 527d8dbcee0090de…

MALICIOUS

PDF

49.3 KB Created: 2020-11-07 05:17:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 20a7d6931eccb6954975d0eb87f55746 SHA-1: d3b2d66e2c92f6a1beaf71a19bedc50cc93ea5a5 SHA-256: 527d8dbcee0090de994f911481ef17303c1279fe674f3166bc6c6b0ae769c23b
124 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, traffmen.ru, which is likely intended to lead the user to a phishing or malware distribution site. The document body, though partially obfuscated, contains text related to 'Orion hcca 12 price' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier strongly indicates maliciousness.

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://traffmen.ru/aws?keyword=orion+hcca+12+price In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366366/normal_5f880b4a52560.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450507/normal_5fa37ab45e5d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374976/normal_5f8ecd27f17ca.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/dd43ea2b-d776-4bc8-ba85-2f9a2bd47e24/rosikudopazuxotasuwa.pdfIn PDF document text
    • https://kinateno.files.wordpress.com/2020/11/pejapapakeliguzibopo.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/ar_carry_handle_red_dot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a190b423-bc51-4ce1-bcb2-c5b9f9b2a20f/zevutofigefod.pdfIn PDF document text
    • https://saxixukosob.files.wordpress.com/2020/11/88806970067.pdfIn PDF document text
    • https://temobozuz.files.wordpress.com/2020/11/geneva_mechanism_calculation.pdfIn PDF document text
    • https://begazeporef.files.wordpress.com/2020/11/52354803621.pdfIn PDF document text
    • https://gogabimujuw.files.wordpress.com/2020/11/82575258512.pdfIn PDF document text
    • https://bolawudadek.files.wordpress.com/2020/11/jeet_kune_do_book.pdfIn PDF document text
    • https://koregik.files.wordpress.com/2020/11/polaroid_sx_70_instruction_manual.pdfIn PDF document text
    • https://depobudad.files.wordpress.com/2020/11/salivary_gland_carcinoma.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_off00008043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8043 5020 bytes
SHA-256: 7cb574343dd3e276d93504dc62731d1dfac15a841098788825719ffe27731ca1
font_01_sfnt_off0000915b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x915B 11636 bytes
SHA-256: 71d7261957dceb4ad1fa0725f018b128a2bacadbdcd70aa6afecba2b0fe740e6

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