Malicious PDF — malware analysis report

Static analysis result for SHA-256 202459a6c0dbf1a8…

MALICIOUS

PDF

37.5 KB Created: 2020-08-30 00:04:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fbcf5a99eb2f83f90a70af10126e5fe SHA-1: 6d5cfde228a6eb4d3c0f0e5d9723d5d813b0c9cf SHA-256: 202459a6c0dbf1a873cda6e9a6f590e0692166a1e5583963a6263dfb70c2472d
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic identifying it as a PDF SEO link farm. One of the primary URLs, 'https://ttraff.ru/wix?keyword=under+the+sea+guitar', is flagged as a known malicious redirector. The document body, though partially corrupted, contains this URL and other benign-looking URLs hosted on 'static.usrfiles.com', suggesting a coordinated effort to distribute malicious content through a network of linked 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/wix?keyword=under+the+sea+guitar
    • https://static.usrfiles.com/ugd/5fd5c1_7930fcbcdfe348f3b782cef0629e58f6.pdf
    • https://static.usrfiles.com/ugd/c7a620_058dedc5bff14a5e8355c1a75acf1354.pdf
    • https://static.usrfiles.com/ugd/b8c837_6be614b22c3548e18788740c7ce0d049.pdf
    • https://static.usrfiles.com/ugd/b8c837_8ab13af961bc4280b78ae6cec885a270.pdf
    • https://static.usrfiles.com/ugd/ea5d7b_815facb080e549ba995226624461bd01.pdf
    • https://static.usrfiles.com/ugd/9e41f0_30d4a16f5a8146bdbabe610dd7a1ed1b.pdf
    • https://static.usrfiles.com/ugd/b8c837_caaba8d62c9f49278d45ca32e7757fe3.pdf
    • https://static.usrfiles.com/ugd/07625c_36d11cb92cd6461b85cee4aef5c69299.pdf
    • https://static.usrfiles.com/ugd/ce14f3_e7595895e55c441a940a53fa04276a1c.pdf
    • https://static.usrfiles.com/ugd/166c09_b44c5b24bef44f199c9a9ebc8f5544a3.pdf
    • https://static.usrfiles.com/ugd/5de1df_c016649bf0924639a2b497b8255d242e.pdf
    • https://static.usrfiles.com/ugd/865d50_c951a754dfaf44d58050fd588749c993.pdf
    • https://cdn.shopify.com/s/files/1/0460/1561/1039/files/revikuzakagujitubalonara.pdf
    • https://cdn.shopify.com/s/files/1/0433/6576/1176/files/28235685107.pdf
    • https://cdn.shopify.com/s/files/1/0430/4420/8797/files/gadebilebawenagezadika.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_off00004931.bin
c0b0a0b66526e4fd7b28ebde9c682318f7482c04f87488d7b2ac94eb8249124a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4931 5048 bytes
font_01_sfnt_off00005a51.bin
fdcc35b83ef01b54bc535b398aad0b072e27b3dd1afe4a685288fff187206a12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A51 14440 bytes

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