Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa92589307e24f9e…

MALICIOUS

PDF

43.6 KB Created: 2020-08-31 07:43:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7c6f728e6335b52cf3dd6aedbaf39b0 SHA-1: 7086458faaab4c0765afdb2198fe9cddab526423 SHA-256: fa92589307e24f9eafc087b11f71050551ef81bf9e31d25308ee4e3816962dd3
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.com/wix?keyword=a+compound+sentence+with+a+conjuncti. The document body is heavily obfuscated, but the presence of numerous links suggests a link farm or redirection strategy to distribute 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.com/wix?keyword=a+compound+sentence+with+a+conjuncti
    • https://static.usrfiles.com/ugd/7041e4_7312415a6a0848a0be4b9c3d72ff417c.pdf
    • https://static.usrfiles.com/ugd/ecec20_2054a71052f842748059600acc2b32f5.pdf
    • https://static.usrfiles.com/ugd/e4ff69_cd4db13c5406490694f332ee79d3a9cf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0212/5733/files/69796128572.pdf
    • https://cdn.shopify.com/s/files/1/0439/8897/5774/files/mupevixi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2230/3911/files/74094290655.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/super_mario_bros_pc_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0440/3865/2069/files/bipefewab.pdf
    • https://cdn.shopify.com/s/files/1/0436/7358/3781/files/96547131081.pdf
    • https://cdn.shopify.com/s/files/1/0428/7060/3932/files/john_deere_parts_diagrams.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9799/files/bad_genius_full_movie_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0433/1952/5531/files/pokemon_yellow_emulator_pc.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_off00006b77.bin
7b89c5cf95471200cc1dd1b71bdc7a0891cd1fede92011e0eb457ad626f74fb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B77 5340 bytes
font_01_sfnt_off00007d8d.bin
6c0d1b81a0db00ae5eae71ba046346be55f30de30b06e765b324e759118ae1c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D8D 10116 bytes

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