Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e6ed87f3f82542f…

MALICIOUS

PDF

45.4 KB Created: 2020-08-20 13:45:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44361a162c689281ef0230ab7b7bb035 SHA-1: c8c25ded7c4eecb4e68f8f499b1c5a5c0612e7f2 SHA-256: 9e6ed87f3f82542f68149a63dcee8ce86f1f4bc7facc75a33f120cd41c054b07
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, includes the same URL and appears to be a lure related to learning Japanese. The presence of a link farm heuristic further suggests a malicious intent to drive traffic to potentially harmful sites. The file is generated by wkhtmltopdf, a tool often abused for creating malicious documents.

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/pify?keyword=apprendre+le+japonais+facilement+pdf
    • http://files.elliottmilesmckinley.com/uploads/1/3/1/8/131871466/a173e.pdf
    • http://kedik.bringitonline.in/uploads/1/3/2/8/132814500/gopimet.pdf
    • http://files.sanluisrestaurant.com/uploads/1/3/0/7/130776433/pisuxikipunebuw.pdf
    • http://dujifom.corkscrewcollectors.com/uploads/1/3/1/6/131637316/mimibeluvusubidome.pdf
    • https://cdn.shopify.com/s/files/1/0435/0479/5800/files/litotenevavaweletosirugad.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/dibujos_colorear_animales.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pujipipokumamidepuw.pdf
    • https://cdn.shopify.com/s/files/1/0437/5950/1464/files/disconformidad_alta_medica_inss.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2277/files/31404310950.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4336/files/jobov.pdf
    • https://cdn.shopify.com/s/files/1/0431/6269/7894/files/73573359078.pdf
    • https://cdn.shopify.com/s/files/1/0429/7474/0639/files/xakagivenonoraw.pdf
    • https://cdn.shopify.com/s/files/1/0430/6305/0394/files/74079186987.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000619b.bin
8d9bcc24984b78e084c38877a24415254f263f62f2cfb4eb2f26a4fb88cb3449		 pdf-font-stream PDF embedded font (sfnt) at offset 0x619B 3784 bytes
font_01_sfnt_off00006f0e.bin
14cf75132f14f05054cb5cc598abedc5ce4fdfc80b992cfc214c327e2a2cec83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F0E 5368 bytes
font_02_sfnt_off00008138.bin
30c7c99705b89d87227bb8e83a735ecd3eb1c81ba45b2b35a8c05dc31367d0aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8138 12076 bytes

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