Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b32763b6726e68d…

MALICIOUS

PDF

41.6 KB Created: 2020-09-02 07:22:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81818af2e9316e52b30fa197df486ae3 SHA-1: a7a21ab9608b2192935539870d763956f548ace2 SHA-256: 4b32763b6726e68d5f5f3ac5bd4dfde13f81229b177c95d87ed60a10f89fa82a
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure via the URL https://ttraff.cc/wix?keyword=glencoe+algebra+2+online+textbook+pdf. Additionally, the PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, with the first being https://cdn.shopify.com/s/files/1/0428/8974/0441/files/biozone_year_12_biology.pdf. The document body, though heavily obfuscated, contains references to educational materials and the malicious redirector URL, suggesting a lure to trick users into clicking the link.

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.cc/wix?keyword=glencoe+algebra+2+online+textbook+pdf
    • https://cdn.shopify.c
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/biozone_year_12_biology.pdf
    • https://cdn.shopify.com/s/files/1/0428/1221/1359/files/womuzarula.pdf
    • https://cdn.shopify.com/s/files/1/0435/7606/6207/files/matipebegobibodarobuxa.pdf
    • https://cdn.shopify.com/s/files/1/0435/7236/3432/files/borolisogadinudatafawiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/4028/4577/files/rujogimofifurorobajafep.pdf
    • https://cdn.shopify.com/s/files/1/0433/3967/7861/files/google_sheets_sum_of_column.pdf
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/81949900459.pdf
    • https://cdn.shopify.com/s/files/1/0434/0721/2694/files/75925810080.pdf
    • https://cdn.shopify.com/s/files/1/0440/6440/7702/files/36684625988.pdf
    • https://cdn.shopify.com/s/files/1/0436/6503/1321/files/darerawevupaloxegapoz.pdf
    • https://cdn.shopify.com/s/files/1/0429/6625/3724/files/fasciola_hepatica_bovinos.pdf
    • http://www.macromedia.com/go/getflashplayer
    • 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_off00005287.bin
a83b5236ace98ab021238b35518e505895fe9183c45282910ec5ef82ba58d76a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5287 5368 bytes
font_01_sfnt_off000064de.bin
bf80fa1d2c9ea23f0504276f89912d521c96cfad37783839626987ea78bbd900		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64DE 11932 bytes
font_02_sfnt_off00008b55.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B55 4324 bytes

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