Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2b9de83546d6c07…

MALICIOUS

PDF

40.9 KB Created: 2020-11-06 00:41:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6883b9fbc2d9026cc80cfeafdbb97488 SHA-1: 1a563071cc236d0e1e8eee6b02396e1a86289a9b SHA-256: c2b9de83546d6c071749c664bf4bcd3a6818ac8a398c68b9da74bcf757f35fb3
154 Risk Score

Malware Insights

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

This PDF document contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://gettraff.ru/123?keyword=balancing+equations+worksheet+1+answers', suggesting a lure to a malicious site disguised as educational content. The presence of a large number of external PDF links further indicates a link farm or SEO manipulation tactic, likely to drive traffic to malicious destinations.

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://gettraff.ru/123?keyword=balancing+equations+worksheet+1+answers
    • https://zizuralozirufu.weebly.com/uploads/1/3/1/4/131483034/xujafavajojovex.pdf
    • https://sobaxijuxoje.weebly.com/uploads/1/3/4/2/134235367/6b3e339db82cc.pdf
    • https://talapilodegopez.weebly.com/uploads/1/3/0/9/130969507/dababav_felirag_vamapu.pdf
    • https://tugajepefur.weebly.com/uploads/1/3/1/4/131453805/zupebowelupepavetin.pdf
    • https://sabijodamibig.weebly.com/uploads/1/3/0/7/130775907/193cbfd.pdf
    • https://rapokivagifo.weebly.com/uploads/1/3/4/3/134338569/gowilipawalop_genomakezupip_putosip_notom.pdf
    • https://dekekutema.weebly.com/uploads/1/3/4/4/134440935/2512209.pdf
    • https://gadigode.weebly.com/uploads/1/3/2/6/132680949/lodajedaxape_jerewavedu_waxitiges_gimugexufod.pdf
    • https://ruvazokof.weebly.com/uploads/1/3/4/0/134040659/jomevasabejitaren.pdf
    • https://jidukuroji.weebly.com/uploads/1/3/4/0/134013204/8c880af14c937a9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4534277b-bb26-4007-98c5-e8709bcde4f2/tojuwebegow.pdf
    • https://uploads.strikinglycdn.com/files/761189d0-3aa8-4dae-bfc5-2c91f1248bc7/ranger_guide_black_desert.pdf
    • https://uploads.strikinglycdn.com/files/5e62a48d-d306-45d0-ba62-6776df7a04dd/sanky_panky_3_full_movie_free_online.pdf
    • https://s3.amazonaws.com/nitidadufetenu/15453112718.pdf
    • https://s3.amazonaws.com/sigobija/vosawodatafujozewus.pdf
    • https://uploads.strikinglycdn.com/files/c6d674f2-60ac-46ec-9264-c7ee45c24314/98169424845.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_off00006109.bin
183c5d000a38e63963a004acd88059c663a0309ae0e56874d603a7a22eac8587		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6109 5444 bytes
font_01_sfnt_off0000739d.bin
fca3bd062282e4835a8f09c7e2acc06f2517165339775f54664e4e1fe8205e65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x739D 10316 bytes

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