Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b948919b83259b4…

MALICIOUS

PDF

34.0 KB Created: 2020-08-31 02:06:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d6682e4b4b079a890ef60c4d7546bee SHA-1: dfc853433468a82596ba8fc412bb19dd2bf20e46 SHA-256: 8b948919b83259b42e5582988ea8ac7991c4a955352fddf69e7ad0061e279208
150 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and a reference to 'ice wolf pelt skyrim', suggesting a lure. The PDF also contains a large number of external links, many pointing to Shopify domains, which is characteristic of SEO link farm techniques used to obscure malicious activity.

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.ru/wix?keyword=ice+wolf+pelt+skyrim
    • https://cdn.shopify.com/s/files/1/0437/4419/8805/files/mokefezirukivizuwazoxu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4930/4742/files/kawabaxedubo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/riginijulu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3738/5123/files/biomass_energy_lecture_notes.pdf
    • https://cdn.shopify.com/s/files/1/0437/5147/3303/files/exercices_sur_l_appareil_digestif.pdf
    • https://static.usrfiles.com/ugd/61804c_62d8c6b3fe134afd9a985af6c591022b.pdf
    • https://static.usrfiles.com/ugd/23b571_5ed667de017b4c4db4a6917a018b8a1f.pdf
    • https://static.usrfiles.com/ugd/5360f8_f5e0e4f3ae7b404c833699fce5124bfd.pdf
    • https://static.usrfiles.com/ugd/10b11f_0ba5784f062a42a1a16ee5dcf6b18cd2.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5fbdb21f8294122bed343ea0e67c279.pdf
    • https://static.usrfiles.com/ugd/b8c837_3bc19c4b22e94fb09da987312d9a7df4.pdf
    • https://static.usrfiles.com/ugd/b8c837_114f6fa836b74e938d7a4e247ad61e08.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c62e97ffeee4f0890a877e5def6a7db.pdf
    • https://static.usrfiles.com/ugd/590778_1d3f9cd492594fd8986a821d3ddaaa27.pdf
    • https://static.usrfiles.com/ugd/c0b427_07235ac48ecc43aaa7addad4458d0e0a.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_off00004785.bin
7233e08f0f18925cecb8ca9973406154c45b4c346b7e7aca46e47024d2ef8fdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4785 5148 bytes
font_01_sfnt_off00005906.bin
c24f27202c5c7d522a5659f42c338811d40fc9cdb3a7684c67615009cf0129a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5906 10068 bytes

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