Malicious PDF — malware analysis report

Static analysis result for SHA-256 02d2c8b83134585c…

MALICIOUS

PDF

40.9 KB Created: 2020-10-25 20:09:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b4cdb03c9b13759b67210304fd6a18c6 SHA-1: d4bb87dc700d6b71e3fa83e7d352769bb28e5ea6 SHA-256: 02d2c8b83134585c4e2462c2b9507ff064704fb9f399457885641faddd5b6057
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector pointing to 'https://cctraff.ru/123?keyword=lyme+disease+nhs+guidelines'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick users into visiting a malicious site. The presence of a large number of external PDF links further indicates a link farm or SEO manipulation tactic, likely to obscure the malicious intent.

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=lyme+disease+nhs+guidelines In PDF document text
    • https://nusoselif.weebly.com/uploads/1/3/4/4/134470887/gatopimi_buwexu_gebuzomaro_ziguwotadenuw.pdfIn PDF document text
    • https://sizukejagu.weebly.com/uploads/1/3/2/6/132681884/punibomade.pdfIn PDF document text
    • https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/4fcf7b50e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415061/normal_5f950e9b6d0ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369776/normal_5f8b914c64839.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369328/normal_5f909d6694743.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/3f2baa6b-f66c-4073-82f0-4f1cd8484c43/mofudokusafopoboleriwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a28e640-402c-4593-abbf-040a7e7597af/8825563808.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90a27e86-be71-47df-8f7d-3b6fc5788de1/1078440668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00d63c28-aea1-42ed-b3b0-7dc47323baec/zokazewajinagariraxivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c97b280-c6ee-4ffc-acf7-212464f7ee9d/61879494271.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b843fb50-a93f-4ad5-a404-334ba074df2a/fuguro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45463854-ee68-42c7-901c-cf339211336a/31067067380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ded44ff-443c-4032-9200-1ac3a2c7cd00/zawinuxezikoxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69c19ccd-de3c-49db-bd9c-ef6d3d6fa518/lodiwesesoxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9125/5713/files/manual_alignment_pc_dmis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/norokozezuxoxagejut.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_off000061f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F0 5188 bytes
SHA-256: 1e35fcb9bab31c92642297e0a8602a2d7bfb8645a19e81562e865b346b28917d
font_01_sfnt_off00007379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7379 10328 bytes
SHA-256: 67ad95881aa7a905e19b11f3b99c96615c1dd927d1974bc9a2c448fb7f5d2747

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