Malicious PDF — malware analysis report

Static analysis result for SHA-256 f12f6ebef423d31b…

MALICIOUS

PDF

35.8 KB Created: 2020-08-23 02:16:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5637eb33863bfd35bcb0fe7e50599d72 SHA-1: 0e4f556e5ac966a276bb1e20bf29807e3f18a64c SHA-256: f12f6ebef423d31b357a60107b70814ab67610de88643132eb45763f02a74b3d
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text that appears to be a title 'Andrology laboratory manual', suggesting a lure. The file also exhibits a PDF link farm heuristic, with numerous links to shopify.com and other domains, indicating an attempt to distribute content or traffic. The primary malicious IOC is the redirector URL.

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.com/pify?keyword=andrology+laboratory+manual
    • http://xuxafo.shopmerryweathers.com/uploads/1/3/1/8/131872203/paxotiwode.pdf
    • https://cdn.shopify.com/s/files/1/0437/2758/5430/files/spreadsheet_excel.pdf
    • https://cdn.shopify.com/s/files/1/0429/5449/0012/files/46773958932.pdf
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/zusidires.pdf
    • https://cdn.shopify.com/s/files/1/0429/9299/2410/files/jibapufujavagig.pdf
    • https://cdn.shopify.com/s/files/1/0436/8223/4521/files/xebixifazovemakatifedipe.pdf
    • https://cdn.shopify.com/s/files/1/0433/9204/1118/files/taxekewalubopa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/sonepizar.pdf
    • https://cdn.shopify.com/s/files/1/0434/2808/5912/files/kifuropoduwib.pdf
    • https://cdn.shopify.com/s/files/1/0433/5756/9189/files/instagramm_for_blackberry.pdf
    • https://cdn.shopify.com/s/files/1/0454/8090/2806/files/bureaucracy_assignment.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_off00005034.bin
844fe767f5d0695307dfb5c1ecd281168a94516107d348a205692ec240ebad16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5034 5200 bytes
font_01_sfnt_off000061cb.bin
f60abf2b666b7e11113769178e770fb2293617bf33c1a1dcd058ae1620af4c1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61CB 9696 bytes

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