Malicious PDF — malware analysis report

Static analysis result for SHA-256 34e193d61560b0e6…

MALICIOUS

PDF

41.7 KB Created: 2020-10-30 17:45:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 65964bc0ed70b66a480e3d6bd569915c SHA-1: 2b45ec21de3da8f34a602be587d5a34547785445 SHA-256: 34e193d61560b0e603d18ef53efa46d2a66f88df3133a3ff056f8040eba470f5
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though partially obfuscated, includes the URL 'https://cctraff.ru/123?keyword=jamie+eason+phase+1+day+4', suggesting a lure to a malicious site. The presence of a large number of external links, many pointing to benign content, indicates a link farm strategy to obscure the malicious destination.

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=jamie+eason+phase+1+day+4 In 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/6ca22ca1-ee9a-4d93-8fd5-1eb0afba8138/rubododaliribub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34495f96-53c9-488f-8cca-525152847f14/david_batchelor_chromophobia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6051/7274/files/86732162459.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dd3add5-a613-4fc6-9f88-d23125cadeb1/add_corundum_ingot_skyrim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48eb545c-0c40-454a-851d-a7574033503f/star_wars_12_inch_figure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9ae82fc-f270-478d-ac07-3c4ce3de38cb/74399103464.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/curso_de_frances_em_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9545/6413/files/febenirasefa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16f44acd-a2a3-4631-a3b8-5eff638b114e/nunusutefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e3b740d-fdd2-4bed-8bc9-af608e996fa0/94878287118.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/craniotomy_adalah.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5668981-7fde-445e-ada6-02146366cc74/cafe_kid_devon_crib_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dea56d63-d43a-438c-a717-eabbdebbc7d2/pronoun_antecedent_agreement_workshe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c7125db-4128-496c-bf7f-761e86df55fa/2018_amc_12a_cutoff.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C2D 5300 bytes
SHA-256: 47b89ab291ccb4b79a136a070c84e4e41342c6285940540bbf2a4251c5c67246
font_01_sfnt_off00006e1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1A 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off000076a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76A8 10288 bytes
SHA-256: d162cfaefdd213b199bf4b67245c9e037d41ab5a41523cbd684debef993a9970

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