Malicious PDF — malware analysis report

Static analysis result for SHA-256 79d40bc20cf5a37b…

MALICIOUS

PDF

54.3 KB Created: 2020-08-05 16:07:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5475102e423948d9c8d0544e16df635f SHA-1: 8925a07bba5171542bf535d0c3ad06617922adf8 SHA-256: 79d40bc20cf5a37bb1957b036529531bb8877a806ef8474e446c657a41e51470
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to PDF files hosted on Shopify. One of these links, however, redirects to a known malicious domain (ttraff.ru). The document body, though heavily obfuscated, contains the same redirect URL, suggesting a deliberate attempt to lure users to malicious infrastructure. The primary attack pattern involves a link farm designed to obscure the malicious redirector.

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=autocollimator+pdf+download
    • http://files.hellovetmed.com/uploads/1/3/0/7/130775286/funajujijal.pdf
    • http://files.aforactive.co.uk/uploads/1/3/2/6/132681772/8107115.pdf
    • http://files.spanishschoolbus.com/uploads/1/3/2/6/132683070/jojitevifinudi-bulivulowizepi.pdf
    • https://cdn.shopify.com/s/files/1/0440/5320/1046/files/gowujuwu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/jowuduwokuludesobokager.pdf
    • https://cdn.shopify.com/s/files/1/0432/5713/5257/files/soxotuduj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7082322425.pdf
    • https://cdn.shopify.com/s/files/1/0428/1679/8883/files/rakijigudud.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/61371093756.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/55815319595.pdf
    • https://cdn.shopify.com/s/files/1/0435/4460/8932/files/43233127261.pdf
    • https://cdn.shopify.com/s/files/1/0430/0426/4602/files/likukikevelepuseni.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4830/files/zivotekosijesonenezus.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9483/files/983570638.pdf
    • https://cdn.shopify.com/s/files/1/0431/6132/1621/files/path_2_1_9_7_1.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/moxudenolaruxorurafugi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4813/2008/files/37103242209.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000759d.bin
05439cdebf89377073fb787e0902b3acaff0fcdae4fbe7c8c3cd40951a3099d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x759D 4968 bytes
font_01_sfnt_off00008670.bin
f86e6a9cd6676e99126be1b0d853f64f8dc7a7b7d83c9ee396dcb102f32b293b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8670 9948 bytes
font_02_sfnt_off0000a8ad.bin
852e0d6ce07a1db2e11154f4548aec4dc29a2cf073112f8b6a2b4be1be4894b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8AD 16172 bytes
font_03_sfnt_off0000bdcb.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBDCB 4324 bytes

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