Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b4d1509f641ea43…

MALICIOUS

PDF

41.6 KB Created: 2020-08-29 17:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f9fd5b78e20c9e24066767a83115a2d SHA-1: 92ad49373fe30653c8e986619fed580d3bb9d11b SHA-256: 7b4d1509f641ea43d56fdb14c9d85da2b4c8ba8de994ad8cd3ef13adafa33733
168 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely part of a lure to download a password-protected archive. The document body, though heavily obfuscated, contains text related to downloading archives and a URL that matches the redirector. The presence of a 'password-protected archive handoff' heuristic further supports this. The document also contains a large number of links to static.usrfiles.com, which may be part of a link farm to improve search engine ranking for malicious downloads.

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=swift+shader+3.0+rar+download+tradownload
    • https://static.usrfiles.com/ugd/b8c837_abcc28a4d8af49968202b82dd3743905.pdf
    • https://static.usrfiles.com/ugd/b8c837_c1a627c5ce0b43ecb4bf5698ded0d5e3.pdf
    • https://static.usrfiles.com/ugd/b8c837_c65af926c56240ddb3ca1dde6b75fe90.pdf
    • https://static.usrfiles.com/ugd/b8c837_90c07018ecf4457aad1802b842a1e0c5.pdf
    • https://static.usrfiles.com/ugd/856cea_82e4ac7732e2428d957071cc8ca0818f.pdf
    • https://static.usrfiles.com/ugd/b8c837_6b9ff62aa34b47128ba059d2b058d4c9.pdf
    • https://static.usrfiles.com/ugd/b8c837_86be33b931344efba0f429b74e7e9e4c.pdf
    • https://cdn.shopify.com/s/files/1/0431/4942/6845/files/sovadodetejevujobelati.pdf
    • https://cdn.shopify.com/s/files/1/0430/1701/1353/files/39629320027.pdf
    • https://cdn.shopify.com/s/files/1/0430/4551/9513/files/belafadejurafezejop.pdf
    • https://cdn.shopify.com/s/files/1/0430/2408/9242/files/wokolosubijud.pdf
    • https://cdn.shopify.com/s/files/1/0432/9281/9616/files/61942118133.pdf
    • https://cdn.shopify.com/s/files/1/0431/6217/3604/files/26437396531.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/24221046066.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_off00006299.bin
d747b604bf76b07731c2e0bd917799974c2385989395f11ec1ecdefc01e95cee
pdf-font-stream PDF embedded font (sfnt) at offset 0x6299 5528 bytes
font_01_sfnt_off0000756e.bin
3e9f423cb9b386fe224f027efa8582592e4075d00493013e2df5fccfced3c69e
pdf-font-stream PDF embedded font (sfnt) at offset 0x756E 10460 bytes