Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8c22615dfe78d4d…

MALICIOUS

PDF

40.5 KB Created: 2020-09-06 17:55:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9e84acaf96aae4125f6f0be35013d22 SHA-1: 47b72dd9ce3731c8daad6b13c65f3fc8e6f19e52 SHA-256: c8c22615dfe78d4d3add79a7b23e6d081196c8898c96d268c2d4a4331332458e
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm, with many links pointing to Shopify domains. The primary malicious URL is https://ttraff.me/wix?keyword=30+day+cancellation+notice+template, which is likely used for phishing or to distribute further malware.

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.me/wix?keyword=30+day+cancellation+notice+template
    • https://cdn.shopify.com/s/files/1/0435/3212/4312/files/el_aprendiz_de_brujo_ii_pnl.pdf
    • https://cdn.shopify.com/s/files/1/0451/8402/4725/files/yo_yo_intermittent_recovery_test_level_1_score_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0427/7751/0055/files/troybilt_tiller_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0437/8198/0317/files/62608691012.pdf
    • https://cdn.shopify.com/s/files/1/0457/6342/8516/files/canyon_camera_driver.pdf
    • https://static.usrfiles.com/ugd/9374a7_979442ea695d454580e19e9a513edcb6.pdf
    • https://static.usrfiles.com/ugd/c1108c_d0c128269ef04f2b9cc9fd5edcfb4435.pdf
    • https://static.usrfiles.com/ugd/7598fa_e84958353b0a43b8a2c5a2653291ced7.pdf
    • https://static.usrfiles.com/ugd/f1c748_6a56c50176f943d3b9e6d03256e5cc48.pdf
    • https://cdn.shopify.com/s/files/1/0464/2353/9864/files/teamviewer_gratis_11.pdf
    • https://cdn.shopify.com/s/files/1/0440/0627/7278/files/lines_of_symmetry_5th_grade_worksheets.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/1/0451/8402/4725/files/yo_yo_intermittent_recovery_

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060d8.bin
ae62bcba188ae82b3d8dc6f46de2903f0c689742a6deb29bf0bd7f520da68395
pdf-font-stream PDF embedded font (sfnt) at offset 0x60D8 5260 bytes
font_01_sfnt_off000072b5.bin
ded86e7705b0defd4e9d12d6c94652315781d74324ac63502ab2de35613871e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x72B5 10000 bytes