Malicious PDF — malware analysis report

Static analysis result for SHA-256 233f63b6425b2b6b…

MALICIOUS

PDF

40.9 KB Created: 2020-08-30 05:22:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61b6a54695af254cb06a057ee99abaee SHA-1: 34230d7aa995ae64e53032d94c61e8d34404eb50 SHA-256: 233f63b6425b2b6bd952b2611d7d2d98b0049bcc2a8ad2646acee5cedcd00821
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its inclusion of a link farm, a common technique for SEO poisoning and redirecting users to malicious sites. The primary malicious URL identified is https://ttraff.ru/wix?keyword=primaluna+prologue+five+amplifier, which is flagged as a known malicious redirector. While many other URLs point to benign Shopify files, the presence of the malicious redirector is sufficient evidence of malicious intent. No scripts were extracted from this sample.

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.ru/wix?keyword=primaluna+prologue+five+amplifier
    • https://cdn.shopify.com/s/files/1/0438/4584/5152/files/free_netflix_account_generator.pdf
    • https://cdn.shopify.com/s/files/1/0432/6994/7555/files/50868689048.pdf
    • https://cdn.shopify.com/s/files/1/0435/8170/2303/files/ziraviwizuto.pdf
    • https://cdn.shopify.com/s/files/1/0448/4536/7453/files/acquisitions_incorporated_flip.pdf
    • https://cdn.shopify.com/s/files/1/0429/2077/1751/files/dawik.pdf
    • https://cdn.shopify.com/s/files/1/0438/1576/4128/files/xasukiza.pdf
    • https://cdn.shopify.com/s/files/1/0448/8429/5847/files/tanglewood_2020_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0435/9507/1651/files/les_nourritures_affectives_boris_cyrulnik.pdf
    • https://cdn.shopify.com/s/files/1/0438/3234/4736/files/66117276034.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec1581671e9f4cbabdd2bf6ea3278440.pdf
    • https://static.usrfiles.com/ugd/9219f8_597f9bdc163f4a32bc6400b104bfddf2.pdf
    • https://static.usrfiles.com/ugd/b8c837_779b68eb25c74137b70b912d9a4bf8a8.pdf
    • https://static.usrfiles.com/ugd/eb4c03_dd15c4e102aa4fdc88f03f574d4bff6d.pdf
    • https://static.usrfiles.com/ugd/b7306e_4c663a1f465c4aa28c420634be6dcbcd.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_off000061cd.bin
fa645f4e0c2ed8fca879659c8a232631fcf129f4ee7ba504f7a1811a2daab88e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61CD 5104 bytes
font_01_sfnt_off0000731a.bin
f048624681101644b13d9cde4f4f143a6eb42a4102ec6b17c2e80cedfd032e94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x731A 10420 bytes

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