Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3e68d0a2bc6a5a7…

MALICIOUS

PDF

41.2 KB Created: 2020-08-30 04:18:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f67d56189ebb1df1c93778f94d476257 SHA-1: 52e0004604b4b34d8cd0d6390243706cf6792e9c SHA-256: b3e68d0a2bc6a5a7b7d6fa94211cb9d24541e6ea2aeec4d00349798688400c00
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains this URL and references to a 'janome memory craft 6600p manual', likely a lure. The PDF also hosts a large number of external links, many pointing to Shopify, suggesting a link farm for SEO poisoning or traffic redirection. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.cc/wix?keyword=janome+memory+craft+6600p+manual
    • https://cdn.shopify.com/s/files/1/0431/9664/5536/files/jepewudepoxorulofi.pdf
    • https://cdn.shopify.com/s/files/1/0427/8039/3639/files/zatusosojuriz.pdf
    • https://cdn.shopify.com/s/files/1/0436/9947/0486/files/pirated_ps3_games.pdf
    • https://cdn.shopify.com/s/files/1/0436/9245/8139/files/dunekakanopewevuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/xalesodotaxije.pdf
    • https://cdn.shopify.com/s/files/1/0434/0757/3149/files/44269073698.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/blind_flange_dimensions_chart.pdf
    • https://cdn.shopify.com/s/files/1/0431/5555/4458/files/68092866246.pdf
    • https://cdn.shopify.com/s/files/1/0431/7963/8942/files/gojubatikomipiziw.pdf
    • https://static.usrfiles.com/ugd/8cbfce_c40160f6f9a741ddad9d9ed3af2ce5b1.pdf
    • https://static.usrfiles.com/ugd/e1d12c_e5f90c93dabf4ebd9006c701d143fbb3.pdf
    • https://static.usrfiles.com/ugd/a771bd_7204d54b4e30498bbf202d901e3136d2.pdf
    • https://static.usrfiles.com/ugd/b8c837_ca6aca370f124b1b9c1597a557f422a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_7aefd942af7945398a92b6381d1191bc.pdf
    • https://static.usrfiles.com/ugd/43d598_f4fffa2e0a124d7dabc67da10b3815fa.pdf
    • https://static.usrfiles.com/ugd/b8c837_9230c86d10a04fcba2dab7aade11405f.pdf
    • https://static.usrfiles.com/ugd/b8c837_d995b0f21c214e2bac38c4592f30e4f2.pdf
    • https://static.usrfiles.com/ugd/4c1554_691c0701506b46368ca98b8c0320805b.pdf
    • https://static.usrfiles.com/ugd/a86d68_c62d33fe05e745f3b5d13eccb7f64c32.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_off000059e7.bin
7e6ba9a3cf2ffc76f6da9c6e5f3d2cfcaef5a20f22c5eaf2f12d991df8094c22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59E7 5372 bytes
font_01_sfnt_off00006c16.bin
94023fd393f6ab122643900facae9b2c5795fc2fabbfd4d2e9835bc41e000755		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C16 14052 bytes

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