Malicious PDF — malware analysis report

Static analysis result for SHA-256 f059da333080f480…

MALICIOUS

PDF

51.1 KB Created: 2020-08-20 11:22:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15a73d0c43912c9723a281c0271464e8 SHA-1: 3235e44bb6bb04d289f79d237ff8d2332e71647d SHA-256: f059da333080f4805c53a94e9ff4aec19035b1e26bc1999209d258afa5aa9dd5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=capital+lease+balance+sheet, which is part of a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains this URL and numerous other links, suggesting a phishing or content-luring attempt.

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.ru/pify?keyword=capital+lease+balance+sheet
    • http://files.justinbernasconi.com/uploads/1/3/1/4/131483267/344953.pdf
    • http://tejazon.wyliechoir.com/uploads/1/3/2/6/132682883/9206394.pdf
    • http://winigojev.lillinghallhanoverians.co.uk/uploads/1/3/1/4/131452883/lunudenuvonisim_jiraj.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/likamabununanezowarijutiv.pdf
    • https://cdn.shopify.com/s/files/1/0438/2215/3890/files/94799982942.pdf
    • https://cdn.shopify.com/s/files/1/0435/1829/6216/files/ams_arbeitsbescheinigung.pdf
    • https://cdn.shopify.com/s/files/1/0438/6376/9243/files/ruzegogegabaxon.pdf
    • https://cdn.shopify.com/s/files/1/0431/9664/5536/files/bula_benicar_anlo.pdf
    • https://cdn.shopify.com/s/files/1/0435/1302/0570/files/20266732845.pdf
    • https://cdn.shopify.com/s/files/1/0435/8042/4351/files/busch_gardens_tampa_map_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/5765/9560/files/hells_kitchen_season_12.pdf
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/52037029935.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74808095599.pdf
    • https://cdn.shopify.com/s/files/1/0434/4564/9574/files/30604475117.pdf
    • https://cdn.shopify.com/s/files/1/0434/6668/6617/files/manor_park_primary_school_ofsted_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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e0e.bin
6e091f7f9f7f9f0c56b0d09a3fa5e7ed8968eb4bad613dacd4a1f3dee2d1e18b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E0E 4768 bytes
font_01_sfnt_off00008e2f.bin
b5a4460cca0c821c0c32f9118e965902e802f849af2a0a298d4861e9b9fd7652		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E2F 10200 bytes
font_02_sfnt_off0000b114.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB114 4324 bytes

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