Malicious PDF — malware analysis report

Static analysis result for SHA-256 245219c6f3154387…

MALICIOUS

PDF

49.7 KB Created: 2020-11-03 17:03:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 847dd2cf9e4cdae332b26f5066cdbd6b SHA-1: 1686847582121ac43b6dfb713533a90661fe4ae6 SHA-256: 245219c6f315438765fc231365572b7172815dbee6a5e13dddeb4f269114362c
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to disposable hosting or known redirector infrastructure. The primary malicious URL identified is https://cctraff.ru/123?keyword=lil+abner+movie+1959+online, which is flagged as a malicious redirector. The document's structure and content suggest it is designed to lure users to external sites, potentially for further exploitation or to serve malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/123?keyword=lil+abner+movie+1959+online In PDF document text
    • https://bipikive.weebly.com/uploads/1/3/4/3/134342269/243fc4fac.pdfIn PDF document text
    • https://zuvubexusemeto.weebly.com/uploads/1/3/4/3/134373725/repoxepakakopepeb.pdfIn PDF document text
    • https://kozesetod.weebly.com/uploads/1/3/4/5/134507136/7d31e654a02a.pdfIn PDF document text
    • https://gojufoviwovefu.weebly.com/uploads/1/3/4/5/134515133/daxupatusufoku-vinom-simababogixum.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/0c18874847f.pdfIn PDF document text
    • https://wabumixa.weebly.com/uploads/1/3/4/5/134585451/4503628.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/tibitexil/tivedex.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/bihar_daroga_previous_year_question_bank.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0a84bbb-21f8-470a-8c53-15939071e516/93024329736.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53780e68-6965-492f-8f1f-2255a9e714e0/ismail_adC4B1gC3BCzel_tarihin_pusulasC4B1_2020_soru_bankasC4B1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/651d83aa-831c-4fff-b46b-89c71e4b0ba8/64653715492.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e724ce00-01a2-4b80-b39e-0070bd472fc4/5784021398.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_off000082a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82A6 5124 bytes
SHA-256: bf0419a407b8fbf3674a9d951aaa006785d9f63ce8f0537682c4a3458e9a9cc8
font_01_sfnt_off00009410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9410 11420 bytes
SHA-256: 1c31065556a36b8352f3c8ab6a8b3d753445e865e753690c01aa4bdb1cdadd38

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