Malicious PDF — malware analysis report

Static analysis result for SHA-256 878096c40e339b2c…

MALICIOUS

PDF

44.8 KB Created: 2020-09-03 01:41:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cc732241e9f585971d0769ae9d30d80 SHA-1: 6e906414788cb057fb1207377566153b32174ebb SHA-256: 878096c40e339b2ce5631484975528a581c97800c70004cdcedad61d2d274178
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=defensa+y+justicia+fc+form'. This URL is embedded within the document body, suggesting a social engineering attempt to trick the user into clicking it. The file also exhibits characteristics of a PDF link farm, with numerous external links, many hosted on 'static.usrfiles.com'. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=defensa+y+justicia+fc+form
    • https://static.usrfiles.com/ugd/5ea691_0bfeca92824e45b5ae40e1ba0faf8925.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b1bded44bc649df9930a58778dcf501.pdf
    • https://static.usrfiles.com/ugd/b8c837_afd4a19d531d4e639cf27f3c338d63bf.pdf
    • https://static.usrfiles.com/ugd/93c935_af402a20acc44bada4511e7d2e8e9dc7.pdf
    • https://static.usrfiles.com/ugd/4fb05f_80f1dd9bae7248fa9a00a315bf69c198.pdf
    • https://static.usrfiles.com/ugd/6116da_d5964c51de664ac1af0fb3a928a039ad.pdf
    • https://static.usrfiles.com/ugd/b7ed05_91045d78108d452884738719c782551b.pdf
    • https://static.usrfiles.com/ugd/12dc78_fb9b366e5c594e8a83fe1f3a741c948e.pdf
    • https://cdn.shopify.com/s/files/1/0457/7270/1862/files/83010886109.pdf
    • https://cdn.shopify.com/s/files/1/0461/9898/0757/files/matriculas_departamento_de_educacion.pdf
    • https://static.usrfiles.com/ugd/f65518_948482e85b8e48e1ab05b29a03f8378d.pdf
    • https://static.usrfiles.com/ugd/e745be_41921852919a4511ae5ab90d684d9ed2.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_off00006f0a.bin
28a9c8f47f3a49b2b8c4b898ff27a7887ea9d900c0eb642f5b2dbbf60db807aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F0A 5172 bytes
font_01_sfnt_off000080a8.bin
7d93b88f674bd6423a432949ed4e257c8a7cfb53a7384db3c2ca9249b2dca1cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80A8 11268 bytes

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