Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ff503a229372fb7…

MALICIOUS

PDF

41.3 KB Created: 2020-08-22 16:38:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f371fd1073de2c210ebc4e21c9a18754 SHA-1: c1c78b85036447be042b12cace50789f78b0219a SHA-256: 6ff503a229372fb746a7adf164a1ebcf1bd6330f73d073246c41bde863d2e576
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic firing indicating it redirects to known malicious infrastructure via ttraff.com. The document body, though heavily obfuscated, contains references to the redirector URL and other Shopify-hosted PDF files, suggesting a link farm or redirection scheme. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=ondansetron%2528+zofran+davis+pdf
    • http://fatorobaj.gypsygirlsportfishing.com/uploads/1/3/0/8/130874457/xevopoxojuza.pdf
    • http://files.artoftragedy.com/uploads/1/3/1/3/131384145/8608770.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/4189/1238/files/rokivixuvipolafa.pdf
    • https://cdn.shopify.com/s/files/1/0431/2642/3708/files/wujojifulumorilexo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8289/9871/files/16570012478.pdf
    • https://cdn.shopify.com/s/files/1/0431/1459/4464/files/bertrand_russell_the_conquest_of_happiness_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/bump_bot_discord.pdf
    • https://cdn.shopify.com/s/files/1/0434/0894/9402/files/62400381360.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/nokaguzaseviduru.pdf
    • https://cdn.shopify.com/s/files/1/0437/8587/9713/files/34989530739.pdf
    • https://cdn.shopify.com/s/files/1/0433/9249/9877/files/write_a_note_on_conceptual_vs_empirical_research.pdf
    • https://cdn.shopify.com/s/files/1/0434/1579/7916/files/vijupefigonemuxafitexer.pdf
    • https://cdn.shopify.com/s/files/1/0433/5344/0414/files/nuwefebuvadizum.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/benim_hocam_tyt_video_ders_notlar.pdf
    • https://cdn.shopify.com/s/files/1/0434/6563/8050/files/5th_grade_math_book.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000635c.bin
6e87687fa750132a0336e65b3c18498ed1da73eee6160123b54f75164ca884ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x635C 5216 bytes
font_01_sfnt_off00007544.bin
224bf034c70c7fef0d096a0b507026d1cb4b5324afcd47bcdf3b5936e933b78b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7544 10304 bytes