Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3d8d32e1367069f…

MALICIOUS

PDF

66.8 KB Created: 2020-08-18 15:59:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec4633c790c434219615550e9c57c3c2 SHA-1: 3fed76081adb74bb1b9057edfb9cf72d3754bb5d SHA-256: e3d8d32e1367069f3bf5b250453228036c065a7a211ba34dd8f1d742b72ced68
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains embedded links, with one specifically identified as a malicious redirector pointing to 'https://ttraff.com/pify?keyword=a+forma+da+agua+ingles'. The ML classifier strongly flagged this PDF as malicious, and heuristic rules confirm it links to known malicious redirector infrastructure and exhibits characteristics of a PDF link farm. The document body, though heavily obfuscated, appears to contain the malicious URL, suggesting the primary intent is to redirect the user to a harmful site.

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=a+forma+da+agua+ingles
    • http://zurebo.emilyhector.com/uploads/1/3/0/9/130969723/2877805.pdf
    • https://cdn.shopify.com/s/files/1/0432/2423/6199/files/bilubupiwazelerupujija.pdf
    • https://cdn.shopify.com/s/files/1/0433/4403/5993/files/psp_rpg_games.pdf
    • https://cdn.shopify.com/s/files/1/0432/6191/9396/files/xebafamu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5425/1670/files/tutevujamibijimujutuvipu.pdf
    • https://cdn.shopify.com/s/files/1/0439/1773/8152/files/netonigetelagulun.pdf
    • https://cdn.shopify.com/s/files/1/0431/4238/1725/files/paruda.pdf
    • https://cdn.shopify.com/s/files/1/0433/4151/2855/files/types_of_agglutination_tests.pdf
    • https://cdn.shopify.com/s/files/1/0431/6866/1670/files/gumaxojudizixepefedijesa.pdf
    • https://cdn.shopify.com/s/files/1/0437/1261/0472/files/rumekififetisatudi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2309/8279/files/baby_shark_dance_challenge.pdf
    • https://cdn.shopify.com/s/files/1/0431/5987/9841/files/kosunekozab.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/descargar_libro_after_2_espaol_gratis.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_off0000c6fd.bin
289f86dc3bac7aac8a4dd136078ae3b87a52c2d00a17271384f4d5426480f880
pdf-font-stream PDF embedded font (sfnt) at offset 0xC6FD 5216 bytes
font_01_sfnt_off0000d89e.bin
50a564e5a499c8e1e8a684aa4532420ebb586a86af749be6821d0eb338e2d32f
pdf-font-stream PDF embedded font (sfnt) at offset 0xD89E 11124 bytes