Malicious PDF — malware analysis report

Static analysis result for SHA-256 f79a1270c5c758a7…

MALICIOUS

PDF

42.8 KB Created: 2020-08-20 22:31:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99e5e82730f2754e859a9e81b5c099ff SHA-1: f715f7de544e9e492ba98385f5b9b56ac109552d SHA-256: f79a1270c5c758a74c44f710af645fd8c9f463cb9b65c50442896275c383375e
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=blaggers+guide+to+art'. This URL is embedded within the document body, suggesting a social engineering lure disguised as an art guide. The PDF also exhibits characteristics of a link farm, with numerous external links, many pointing to benign Shopify URLs, likely for SEO manipulation to increase visibility. The ML classifier strongly flags this PDF as malicious.

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.com/pify?keyword=blaggers+guide+to+art
    • http://files.drumartist.net/uploads/1/3/0/7/130738928/5267337.pdf
    • https://cdn.shopify.com/s/files/1/0438/5816/5925/files/tanka_poetry_example.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8280/files/60102322798.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/49110982712.pdf
    • https://cdn.shopify.com/s/files/1/0434/7930/2296/files/91917882592.pdf
    • https://cdn.shopify.com/s/files/1/0437/9141/7505/files/63144098154.pdf
    • https://cdn.shopify.com/s/files/1/0437/4003/7271/files/40523971459.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7717/files/25328121317.pdf
    • https://cdn.shopify.com/s/files/1/0431/3602/4737/files/zaeed_mass_effect.pdf
    • https://cdn.shopify.com/s/files/1/0431/4857/4884/files/meaning_of_language_acquisition.pdf
    • https://cdn.shopify.com/s/files/1/0427/5961/8716/files/polyatomic_ions_answer_key.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/
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/file

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069b2.bin
686031fb27c8ea5f482b9cf499291981f042ec74f709660cb36d61c301172174		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69B2 5044 bytes
font_01_sfnt_off00007ae4.bin
20d0971fd58fe0d2783084a97d042fc9347dff8a057106a6ea27d59fe070497d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE4 10420 bytes

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