Malicious PDF — malware analysis report

Static analysis result for SHA-256 f97d2a2244b3c3c0…

MALICIOUS

PDF

41.3 KB Created: 2020-08-29 11:41:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2523142c7175c013b94f06962a6baca SHA-1: 820b944d6793aaf6bba582c67704d521bf8d11eb SHA-256: f97d2a2244b3c3c02db90c90deb80c6c0e7988a78f8b28a78fc6588a2e40696d
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.me/wix?keyword=kubota+v1505+repair+manual'. The document body, though heavily obfuscated, contains text related to 'Kubota v1505 repair manual' and the URL, indicating a lure to entice users to click the malicious link. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.me/wix?keyword=kubota+v1505+repair+manual
    • https://cdn.shopify.com/s/files/1/0429/7791/9129/files/organic_chemistry_klein.pdf
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/zomelavutolamesotigemez.pdf
    • https://cdn.shopify.com/s/files/1/0431/3510/7233/files/vinera.pdf
    • https://cdn.shopify.com/s/files/1/0431/5263/8116/files/73089168642.pdf
    • https://static.usrfiles.com/ugd/b8c837_b6c06453e1624218908cac67efd7fcb6.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0b2e80b34c54a74b32ebd3bea2f8190.pdf
    • https://static.usrfiles.com/ugd/b8c837_96711c4ee1d3412d9f57b6d255b93abe.pdf
    • https://static.usrfiles.com/ugd/b8c837_048140dc2c5d46d5a66a8433c1475249.pdf
    • https://static.usrfiles.com/ugd/b8c837_6336458b2b384417acd3f79f3e1a4aa3.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad1079afa80c4c25826d0e7217647edd.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf741a8d945f49c5a699f7df45f2abdf.pdf
    • https://cdn.shopify.com/s/files/1/0437/2856/8474/files/bobcat_skid_steer_parts_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/1050/6404/files/sole_agency_agreement_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/6119/9526/files/320204848.pdf
    • https://cdn.shopify.com/s/files/1/0434/7622/2118/files/slicked_back_mohawk.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_off00005d79.bin
db532868f5ea3b812628e1b35b001032bb901ff303ddecb1bab9e1e20c7ab3a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D79 5276 bytes
font_01_sfnt_off00006f5e.bin
be8f9dad563ec1aa2eb2494bc15219a82d6b06dfa8e45e81fd7e6d9c39ee942b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5E 12864 bytes

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