Malicious PDF — malware analysis report

Static analysis result for SHA-256 38848a3de7bd9fbe…

MALICIOUS

PDF

43.3 KB Created: 2020-08-29 18:00:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ad67e915e2a908e754e7e1e6ed41c5c SHA-1: c5682d2053a1f667bec8d53c5a57a40d9d58607d SHA-256: 38848a3de7bd9fbea8b065f03aca7a4cb680183e60f0f645af74dcbd6f73a6f4
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a string that appears to be a search query related to Excel, likely intended to make the malicious link seem more relevant. The presence of a link farm heuristic further suggests an attempt to distribute malicious content through numerous links.

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=excel+2010+create+list+of+sheet+name
    • https://static.usrfiles.com/ugd/b8c837_676f1336fc424038801eb58346dfde07.pdf
    • https://static.usrfiles.com/ugd/b8c837_e42f7d1fd22a4e12a6a2d0c7342f3d16.pdf
    • https://static.usrfiles.com/ugd/b8c837_93b387b90d8041d1806cdeb586303db4.pdf
    • https://static.usrfiles.com/ugd/b8c837_c07078fac9d04a0caddf1b60a8167997.pdf
    • https://static.usrfiles.com/ugd/b98abb_d79e242c3f5a4db4a2d01d203a970ed8.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8865/files/lulekudif.pdf
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/diwubujajap.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefiwi.pdf
    • https://cdn.shopify.com/s/files/1/0440/3986/4485/files/zupifidunulusimepatamu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6124/7129/files/89238220176.pdf
    • https://static.usrfiles.com/ugd/b8c837_a2f640f340c6440aaa326855df987f29.pdf
    • https://static.usrfiles.com/ugd/b8c837_96711c4ee1d3412d9f57b6d255b93abe.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_off00005beb.bin
13de13caa593992df2f076eb7b0250d8536c9115c5b7c4689109ede772e9be2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BEB 5260 bytes
font_01_sfnt_off00006d92.bin
be77c8e37e219e9efb0d3d6efca22dd9ed1fa891d7fd577faec628e9bf545d39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D92 10916 bytes
font_02_sfnt_off0000926b.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x926B 4324 bytes

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