Malicious PDF — malware analysis report

Static analysis result for SHA-256 10ea1c157799ca21…

MALICIOUS

PDF

34.0 KB Created: 2020-11-01 09:39:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f32b7736fdf772ac160a3b16d795c45 SHA-1: 57f8ea70c3872f21ba2a80142cc5d10bcc081411 SHA-256: 10ea1c157799ca214be1c4abd180d6dffd655da954c9c84b2d839293445cf009
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to a link farm designed to host malicious content. One prominent URL, https://cctraff.ru/123?keyword=super+animes+naruto+shippuden+legendado, is identified as a malicious redirector. The document body also contains this URL, suggesting it's the primary lure. The presence of numerous PDF links and the ML classifier's high confidence score indicate a malicious intent, likely to redirect users to harmful websites.

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 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.
  • 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=super+animes+naruto+shippuden+legendado
    • https://xamonato.weebly.com/uploads/1/3/2/8/132814301/jozemat-gagexefatavu-tuxemexo-vefobenexiz.pdf
    • https://cdn-cms.f-static.net/uploads/4379054/normal_5f9e25d74bb45.pdf
    • https://nogomikosisodop.weebly.com/uploads/1/3/2/6/132681488/kavufo_vofugu_ruketi_vowaladatepu.pdf
    • https://bubixoduxufito.weebly.com/uploads/1/3/1/0/131070588/8788062.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nijosinizo/wibelokujobaregipe.pdf
    • https://cdn.shopify.com/s/files/1/0505/5673/1575/files/virtual_reality_roller_coaster_android_game.pdf
    • https://cdn.shopify.com/s/files/1/0494/4068/6258/files/10572628811.pdf
    • https://cdn.shopify.com/s/files/1/0439/9710/2238/files/properties_of_polygons_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0496/7383/0556/files/gizutogezelonarosotevi.pdf
    • https://cdn.shopify.com/s/files/1/0499/7749/1618/files/96218348954.pdf
    • https://cdn.shopify.com/s/files/1/0504/4283/0014/files/72122785273.pdf
    • https://s3.amazonaws.com/petikamov/63952180587.pdf
    • https://uploads.strikinglycdn.com/files/44a3c4cf-f58e-45ca-9c4c-079bd04ca139/kerelelosonisedigatulet.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000477c.bin
4e9fe8d1bfcce60fa6e7b55076e12e3b6ce263a2e0bf4569162e46b8b8c7f281
pdf-font-stream PDF embedded font (sfnt) at offset 0x477C 5476 bytes
font_01_sfnt_off000059eb.bin
d5167f27a4541e28d3e475fc1991d5f933023b8d88ee73ace0b1f174d3b49b9c
pdf-font-stream PDF embedded font (sfnt) at offset 0x59EB 10004 bytes