Malicious PDF — malware analysis report

Static analysis result for SHA-256 b63270c18179de66…

MALICIOUS

PDF

40.0 KB Created: 2020-10-07 20:31:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c0dd1544ee13923b79cf64b0c8f98cc2 SHA-1: d4ae72504122c4af7aca66c339fd072bf41602b1 SHA-256: b63270c18179de666def5334ac2573f817940b223f3f06f13b75f6ffe83ac3c7
124 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains a URL that mirrors the malicious redirector, suggesting an attempt to disguise the malicious intent. The ML classifier also strongly indicated 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://cctraff.ru/pify?keyword=nordic+museum+seattle+gift+shop In PDF document text
    • http://getev.believesfamily.com/uploads/1/3/1/3/131383483/1796074.pdfIn PDF document text
    • http://files.holleywoodcontracting.com/uploads/1/3/1/3/131379268/nabiriminoxizodaz.pdfIn PDF document text
    • http://levib.gypsygirlsportfishing.com/uploads/1/3/1/3/131380755/8935062.pdfIn PDF document text
    • http://files.nicholasperryclark.com/uploads/1/3/0/8/130874600/29395.pdfIn PDF document text
    • https://site-1036791.mozfiles.com/files/1036791/nozexowosewisazumobapem.pdfIn PDF document text
    • https://site-1036798.mozfiles.com/files/1036798/pusimetusut.pdfIn PDF document text
    • https://site-1036665.mozfiles.com/files/1036665/gilemefimela.pdfIn PDF document text
    • http://files.equestderby.com/uploads/1/3/1/6/131636755/7103655.pdfIn PDF document text
    • http://files.animaticboston.com/uploads/1/3/1/3/131379699/jenawimifo_xizuwise_begugewuxemap_wufaw.pdfIn PDF document text
    • http://linoz.sunbearpress.com/uploads/1/3/1/3/131380349/sejomaluzup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2250/8454/files/football_games_apk_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9014/0583/files/lowrance_hds_gen_2_hard_reset.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_off00005c86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C86 5536 bytes
SHA-256: 4a69e2ac51734ed4ada7b0c4d1fadb400d38d2be95fdfe024dc4379f2f2f6f33
font_01_sfnt_off00006f34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F34 10476 bytes
SHA-256: 0189c802c1a3c2fd02a5f290ca14d5e4cfabb732952cad7e525f1ad2bc88f77d

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