Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c3d80c526f125d3…

MALICIOUS

PDF

39.7 KB Created: 2020-08-04 11:16:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a95f88c61e82d8a5a183292482e10a13 SHA-1: 5881910dfe09caf126f1f5aab22fcdbc96afb067 SHA-256: 9c3d80c526f125d351cf0abcf0aba040faf98f3ee5fba5fffc0a232b2569df29
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one URL pointing to a known malicious redirector. The document body, though malformed, contains the same URL and keywords suggesting a lure to disguise malicious redirection. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=tda7294+amplifier+circuit+diagram+pdf
    • http://files.mhfirstresponse.org/uploads/1/3/1/6/131606060/7edd71.pdf
    • http://files.deafwomenofcolor.org/uploads/1/3/1/4/131437987/965469.pdf
    • http://files.lunkerbox.com/uploads/1/3/2/3/132303388/buxodu-wigojis-jijilasib.pdf
    • http://sepexeli.proorganizerslv.com/uploads/1/3/0/7/130775387/gikamebusitovub.pdf
    • http://files.hallgroupchemistry.com/uploads/1/3/2/6/132681443/tiguvemod_rifexifa_tafetif.pdf
    • https://cdn.shopify.com/s/files/1/0434/8379/1526/files/tagomumegudufodufilag.pdf
    • https://cdn.shopify.com/s/files/1/0447/8484/4949/files/mystring_class_c.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xoxolesusoziviro.pdf
    • https://cdn.shopify.com/s/files/1/0435/2026/2308/files/98791215664.pdf
    • https://cdn.shopify.com/s/files/1/0431/6767/8618/files/views_drake_download_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0431/9058/3464/files/zumdahl_chemistry_7th_edition_solutions_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/2031/2991/files/79133393851.pdf
    • https://cdn.shopify.com/s/files/1/0429/6962/8828/files/how_to_connect_ps_vita_to_filezilla.pdf
    • https://cdn.shopify.com/s/files/1/0435/1324/9946/files/xabejazeguzivinokom.pdf
    • https://cdn.shopify.com/s/files/1/0436/6345/8457/files/98306572705.pdf
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/dajobev.pdf
    • https://cdn.shopify.com/s/files/1/0434/8307/0630/files/60659772599.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c69.bin
25f8cb19b1bccf462781be33118324346a7c91eb0d102847b110a306772e4576		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C69 5700 bytes
font_01_sfnt_off00006fce.bin
19f19c26bb64697a273912ee652e1404a28a406dfb7e1c45b9ecd5a2d11273a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCE 9996 bytes

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