Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a27af20e58e79fd…

MALICIOUS

PDF

40.6 KB Created: 2020-08-10 10:01:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ebf3821616568bce40f00a42154db7d SHA-1: af0c8755364e3a734773e9c96c9fa0f15d879c76 SHA-256: 5a27af20e58e79fd37d4fd69790af3781c50838fef74ad36b43ddabd8e382f8c
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to a redirector service (ttraff.ru) known for malicious activity. The document body, though heavily obfuscated, contains the same redirector URL. This indicates a clear intent to lure users to malicious sites under the guise of providing marketing material.

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=buzz+marketing+libro+pdf
    • http://vakiki.feliciakeesing.com/uploads/1/3/1/4/131408738/9cd4e37.pdf
    • http://files.cmbbodywork.com/uploads/1/3/1/4/131438667/lejuzevokajuzuvetu.pdf
    • http://files.alyssamichele.com/uploads/1/3/0/7/130776745/eed7ccac46.pdf
    • https://cdn.shopify.com/s/files/1/0434/4646/8769/files/50908640949.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/textbook_of_surgical_oncology.pdf
    • https://cdn.shopify.com/s/files/1/0434/8982/0836/files/36555528155.pdf
    • https://cdn.shopify.com/s/files/1/0436/6876/6873/files/27382959433.pdf
    • https://cdn.shopify.com/s/files/1/0434/8739/6004/files/animal_farm_characters_summary.pdf
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/58970419905.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/xujuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9058/files/67377193580.pdf
    • https://cdn.shopify.com/s/files/1/0439/0833/3736/files/how_do_you_underline_in_discord.pdf
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/tulilawozusix.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/ketosteril_tablet.pdf
    • https://cdn.shopify.com/s/files/1/0429/9423/7589/files/15964457724.pdf
    • https://cdn.shopify.com/s/files/1/0446/0986/3843/files/adjective_worksheet.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_off0000600c.bin
40ca4ac6abcad98111f66f872a7c4298500201d1a9560277e05d1d3d68132ec4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x600C 5484 bytes
font_01_sfnt_off000072a5.bin
b2e4a63456b0947c3f737f780440c680aeb3f215784590e5646a05970792644b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72A5 10272 bytes

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