Malicious PDF — malware analysis report

Static analysis result for SHA-256 2403a88bf3000b7d…

MALICIOUS

PDF

46.8 KB Created: 2020-08-31 11:33:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac39fc4d4ff441231c42d5e412090f94 SHA-1: 55935ec30f66d04b147b3394ed73cfaec9d879c4 SHA-256: 2403a88bf3000b7da8646e60254a5c70dfd02d35f08861c2f04835c75fda5513
150 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the target URL. The presence of a large number of external PDF links, many pointing to benign Shopify domains, suggests a link farm or SEO poisoning tactic to obscure the malicious redirector. No scripts were extracted from this sample.

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.club/wix?keyword=teen+ice+breaker+games
    • https://cdn.shopify.com/s/files/1/0431/7364/2389/files/division_worksheets_grade_3_with_pic.pdf
    • https://cdn.shopify.com/s/files/1/0427/9736/7452/files/lumozizar.pdf
    • https://cdn.shopify.com/s/files/1/0431/7895/0810/files/zinizezijazisuta.pdf
    • https://static.usrfiles.com/ugd/238140_5c047f6b0d27499090068a90a2fc7ee4.pdf
    • https://static.usrfiles.com/ugd/49be48_d6b38e9dc8374a70b00863f99cb9af3d.pdf
    • https://cdn.shopify.com/s/files/1/0431/8360/3873/files/majakekufesodovelogudu.pdf
    • https://cdn.shopify.com/s/files/1/0446/1376/3235/files/calculus_with_analytic_geometry_swokowski_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/8803/5486/files/puxerazukuposoposadijuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3680/files/60933967871.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zugazad.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8714/files/mipusof.pdf
    • https://cdn.shopify.com/s/files/1/0436/9317/9030/files/fusokazumowafo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d7d.bin
9ab8a2411dafce43d6883d10d19945a9083d2604850e20065c4ea42e2d39538a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D7D 4840 bytes
font_01_sfnt_off00007dc1.bin
a76438fc756a9c65a5af05d345269aa877051d1b97714a5f26d38aabc9f9523e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC1 10240 bytes
font_02_sfnt_off0000a0be.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0BE 4324 bytes

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