Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a126be4a2d08812…

MALICIOUS

PDF

43.6 KB Created: 2020-10-15 21:35:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8807e45e0f017639e1f6262ab083e983 SHA-1: 2922a5b9ee7016bcf894c22809801020544608f6 SHA-256: 0a126be4a2d08812384856b7eaef6ee9437a93649852a256a58c1512fa92eee3
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous links to external sites, many hosted on disposable domains, indicating a link farm designed to obscure malicious redirects. The presence of a 'download button' lure and a critical heuristic firing for malicious redirector infrastructure strongly suggests this document is part of a phishing or scam campaign. The primary malicious URL identified is https://ttraff.ru/pify?keyword=ncert+class+7+english+text+book+pdf.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=ncert+class+7+english+text+book+pdf In PDF document text
    • https://site-1043599.mozfiles.com/files/1043599/14170013654.pdfIn PDF document text
    • https://site-1042555.mozfiles.com/files/1042555/88239523183.pdfIn PDF document text
    • https://site-1043158.mozfiles.com/files/1043158/42537873510.pdfIn PDF document text
    • https://site-1037149.mozfiles.com/files/1037149/kivobigojexosizezedisax.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/44d87feaf8ee.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/xizaxamuxive.pdfIn PDF document text
    • https://gukepofefefika.weebly.com/uploads/1/3/1/4/131437977/7a1ac83a789.pdfIn PDF document text
    • https://rewemekekebaz.weebly.com/uploads/1/3/1/4/131406535/474185.pdfIn PDF document text
    • https://derodaju.weebly.com/uploads/1/3/1/6/131606282/8251542.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/dekegu.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/murokowudeweb.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/nesubine.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/9fee0cd4-afb0-4cb6-aa4a-d4bd022fe8dd/17894137831.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95d89130-c728-4fe9-88b4-18461d312194/35108326223.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/632185ee-a93e-47a7-b0b4-d55efb68d363/vubofirevonolabidobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0442437-7b08-466b-948e-8c8ddefe783a/15228196341.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ac23224-8954-42f5-9543-b73e0a9a96cd/88148660732.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27f59ba9-eb7c-4d9e-9fc3-a42afeca4ee4/82766867422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c02b1287-4df5-4c82-9360-eb610440d94f/gifujiroviruruvola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5044eff1-d6df-4bc4-aeb3-62adf8fd9bcc/94661750193.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90445a87-ae8e-4544-ac8b-5f507163785e/murotowabemekun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c64224c-e89b-4ab7-9af0-e084a7adf841/31575834288.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9037bd8-f437-416f-bb13-9a26207ccaf7/bijadupumugopubitilesof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c49af5e-851b-4b40-b066-fab3f1391230/86067997428.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cddde775-4421-455a-a512-1caf21799eae/pulodelulevilakijepano.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_off00006ab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB6 5740 bytes
SHA-256: d8a178335dd726f5a67961a647258e7f1c7fe7171d65cd9ca9052d760116c3a8
font_01_sfnt_off00007e33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E33 10064 bytes
SHA-256: 343d931832c89dc4be8a1ce8616f592513b2a14342f97a22f07c8e2e49c8495f

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