Malicious PDF — malware analysis report

Static analysis result for SHA-256 fff34835ebcf80e6…

MALICIOUS

PDF

122.7 KB Created: 2020-08-27 16:55:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6facc9300fd7397a1c5d4164b738d6f6 SHA-1: 94f4344ed40d168a952cff4528be780b392621d5 SHA-256: fff34835ebcf80e6ff8d0289912664994d14c7857ad4dac61d2727af19a8e39c
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=felipe+tena+ramirez+derecho+constitucional'. This indicates the document's primary purpose is to lure the user to a malicious site. The document body, though heavily obfuscated, contains the same URL, reinforcing this finding. The file also exhibits characteristics of a link farm, with numerous external links, suggesting a broader SEO-based malicious distribution strategy.

Heuristics 3

  • 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.
  • 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=felipe+tena+ramirez+derecho+constitucional
    • http://files.judithmbishop.net/uploads/1/3/1/3/131398000/fimogazedo.pdf
    • http://files.mooneyhsclassof66reunion.org/uploads/1/3/1/3/131382808/tozonaluwojali.pdf
    • https://cdn.shopify.com/s/files/1/0432/7292/9435/files/dukibu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8240/7335/files/pipal.pdf
    • https://cdn.shopify.com/s/files/1/0432/3239/5423/files/bleacher_report_fantasy_football_week_13.pdf
    • https://cdn.shopify.com/s/files/1/0435/6970/9217/files/srimad_bhagavatam_tamil_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/64294050689.pdf
    • https://cdn.shopify.com/s/files/1/0439/5306/2043/files/23093349354.pdf
    • https://cdn.shopify.com/s/files/1/0435/3651/5221/files/zifonefux.pdf
    • https://cdn.shopify.com/s/files/1/0434/2477/6354/files/lemikewez.pdf
    • https://cdn.shopify.com/s/files/1/0440/6683/2534/files/nuxabesoviwup.pdf
    • https://cdn.shopify.com/s/files/1/0432/3731/0626/files/pruebas_filtradas_ser_bachiller_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/1245/5591/files/kiwanox.pdf
    • https://cdn.shopify.com/s/files/1/0440/2829/7381/files/cnc_machine_cutting_tools.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_off0001948f.bin
97d0e4d1247be211f7bbdcbd02d1a3c241e8209e93c4007d6f260940809ae482		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1948F 5200 bytes
font_01_sfnt_off0001a608.bin
b986f1eca9b20b773ab551abb2a824e53023ac501da2373c5920511cf2ff3a66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A608 12452 bytes
font_02_sfnt_off0001ce2e.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CE2E 4324 bytes

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