Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e15a2d9b238dc35…

MALICIOUS

PDF

53.2 KB Created: 2020-08-04 21:03:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da366d5a4bb7887bee58a1620c7eec51 SHA-1: c0a935a19203122b37319b88fb101d0ff55e3759 SHA-256: 5e15a2d9b238dc356c654ac141ef5ad64a9419174c7a8c1446bd080dfc4d420f
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO abuse tactic. The primary redirector URL, https://ttraff.com/pify?keyword=2020+south+african+calendar+pdf, is flagged as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a malicious intent to redirect users to potentially harmful content.

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://ttraff.com/pify?keyword=2020+south+african+calendar+pdf
    • http://files.northwoodsgroomingco.com/uploads/1/3/0/8/130813054/romodal_lekotug.pdf
    • http://files.dbworldphoto.com/uploads/1/3/2/6/132696210/kolokavujexu.pdf
    • http://files.voterodcasey.com/uploads/1/3/0/8/130814070/fotavadeletetov.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/7881/1810/files/xumegofadowotevadatifusaj.pdf
    • https://cdn.shopify.com/s/files/1/0437/8483/1125/files/17104726109.pdf
    • https://cdn.shopify.com/s/files/1/0430/6681/8721/files/lojevape.pdf
    • https://cdn.shopify.com/s/files/1/0432/8144/9124/files/kalevavufopejimaso.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6306/files/lawudi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2754/5757/files/99013949857.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kerikelamizefebimu.pdf
    • https://cdn.shopify.com/s/files/1/0436/2030/3006/files/wobuviruxuremopege.pdf
    • https://cdn.shopify.com/s/files/1/0428/2525/3023/files/73150072838.pdf
    • https://cdn.shopify.com/s/files/1/0437/9302/3133/files/16855946748.pdf
    • https://cdn.shopify.com/s/files/1/0437/3823/5031/files/movunozisusadosobeboxof.pdf
    • https://cdn.shopify.com/s/files/1/0436/0781/8398/files/amd_hd_audio_device_drivers.pdf
    • https://cdn.shopify.com/s/files/1/0429/5920/8604/files/banyans_surf_report.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005eb1.bin
3c9ae5586c9fede1f38b31a38990c33623f144ecb7646e85db7a90f484de68b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB1 5304 bytes
font_01_sfnt_off0000709d.bin
23a99ca71671456fc1e95b646f79300da46f10f02df3579739d670adb9f9308a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x709D 15156 bytes
font_02_sfnt_off0000a08b.bin
4e27c967d3af9b71d538c389a7435337d74fae44084ff8c77e3f684c0a5c526b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA08B 16920 bytes
font_03_sfnt_off0000b6f9.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB6F9 4324 bytes

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