Malicious PDF — malware analysis report

Static analysis result for SHA-256 e026b457ab9b038e…

MALICIOUS

PDF

40.4 KB Created: 2020-09-02 01:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e8c18fce0a19399e46896ef2c043cc5 SHA-1: 95dbbd753aff99cb9f5fe0db334c8400efbea58d SHA-256: e026b457ab9b038e8ac59e4c3449b0d50d058394f8cdc8036689a8027d3deb55
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL and references to file dividers, suggesting a lure to a malicious site.

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.com/wix?keyword=alphabetical+file+dividers+template
    • https://static.usrfiles.com/ugd/b8c837_ce054c7d533441bb908d312701f67b71.pdf
    • https://static.usrfiles.com/ugd/9ea9b6_4ccf7ee93deb4b03a5da28b2e846e023.pdf
    • https://static.usrfiles.com/ugd/764aaa_cc9dbc61c9134b15bc76d2883ed52c83.pdf
    • https://static.usrfiles.com/ugd/3aca14_4dc5e020c4cd4c3887e3cdb548b59698.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2f3e755c7684819adf616f6772488ab.pdf
    • https://static.usrfiles.com/ugd/05900a_5331da84c52c4add959a72d53a5484c2.pdf
    • https://static.usrfiles.com/ugd/4e6dd5_e50470b3393f4749bd336d554555f457.pdf
    • https://static.usrfiles.com/ugd/38bf1f_b98f65489a4545f2aa3b1250eb45c52e.pdf
    • https://cdn.shopify.com/s/files/1/0435/0181/3915/files/55006189186.pdf
    • https://cdn.shopify.com/s/files/1/0428/6346/0508/files/business_model_canvas_file.pdf
    • https://cdn.shopify.com/s/files/1/0430/8379/2533/files/natopimamipufozorexaja.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_off00006063.bin
eb4d429952b4fd7260edda3d718026e27fcd1a810afc10c80488889002c4e486		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6063 5584 bytes
font_01_sfnt_off00007338.bin
7eb08acdaba5869388753ea13cf7412633174445df01ba46b96cb759f3a36ead		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7338 9992 bytes

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