Malicious PDF — malware analysis report

Static analysis result for SHA-256 150d70a439554cb8…

MALICIOUS

PDF

45.3 KB Created: 2020-09-02 01:19:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3fd4971a26f7c35da9b0d7ca3bfeccf SHA-1: 175c30e56ab0e0a1343ba05518f493fedcd2fae1 SHA-256: 150d70a439554cb89288d38d6e53215c5aed731942a4c79706cee028b01c2f88
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious payload. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier strongly indicated maliciousness, supporting the assessment of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=boogie+woogie+country+girl+piano+sheet
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/cdb50c_f2784886e3114db3a815f9dc248268d9.pdf
    • https://static.usrfiles.com/ugd/d7ba0f_41812a4b65d74ef3be720eba3670534c.pdf
    • https://static.usrfiles.com/ugd/3cb679_b9fa7866c9c04fb7b95e13d86e40b5dd.pdf
    • https://static.usrfiles.com/ugd/1e4819_11e2ab330cf34c889c6f5db3c71085ed.pdf
    • https://static.usrfiles.com/ugd/d79848_4e66469bfaf74ec9bcadbafe6c6f4c18.pdf
    • https://cdn.shopify.com/s/files/1/0431/7354/4093/files/80751748636.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1571/files/zugemununejide.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/kesepokan.pdf
    • https://static.usrfiles.com/ugd/4d935e_48597fa696cd4eed936d9dcae2b14a35.pdf
    • https://static.usrfiles.com/ugd/b8c837_fe21bb3b5f854e4bb769562a51c4d40a.pdf
    • https://static.usrfiles.com/ugd/4826f5_811d5eddb8de4f6dbe29a0a5eb9464ca.pdf
    • https://static.usrfiles.com/ugd/253000_90f5fe958084442e86ecdf974d7a23fa.pdf
    • https://static.usrfiles.com/ugd/b8c837_bec8430e06fd4bc1a8199ad3303ab3a3.pdf
    • https://static.usrfiles.com/ugd/b8c837_8ed5dcf84bea4e1887ed27bc043eac2f.pdf
    • https://static.usrfiles.com/ugd/b8c837_4cba7a58abf64994b0ba3370926cca9e.pdf
    • https://static.usrfiles.com/ugd/b8c837_e51e4b763c4d4ca480252d4b11fa2a4e.pdf
    • https://static.usrfiles.com/ugd/b8c837_b818b6c3533a4e4dbe5128b69367856b.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • https://creativecommons.org/l
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064b0.bin
c23fafc5c4eaf883eabd365b90cdf70c27a66d1b616162ee3de9fc012a0c6594		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64B0 5440 bytes
font_01_sfnt_off00007749.bin
da8651df69c86929369f2bdfa9447542372a2352a0cbc9a466da240aa365c015		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7749 14980 bytes

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