Malicious PDF — malware analysis report

Static analysis result for SHA-256 0324b9d651ad8fb9…

MALICIOUS

PDF

36.5 KB Created: 2020-09-19 18:55:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 433b41fff5ac8f5c2afe313e22632636 SHA-1: 6d05cce3a712c0b924a94c404c4ff8d4e5eed8de SHA-256: 0324b9d651ad8fb9d0d4a39efe7f4b5e323a8232ac70cd3dcb4538331f38d583
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically `https://ttraff.link/wix?keyword=disciplines+of+a+godly+man+pdf+download`. The document body also contains this URL and numerous other PDF links, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

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.link/wix?keyword=disciplines+of+a+godly+man+pdf+download
    • http://files.kristinayee.com/uploads/1/3/0/8/130873943/fb7ff06a270927.pdf
    • http://files.mylendernow.com/uploads/1/3/2/6/132696483/goxejojojorakekofe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://2956ce96-c2d4-494e-b81e-d91e9a7032eb.filesusr.com/ugd/33a16d_77963e29b3a44f4d85775a6522cc51f7.pdf?index=true
    • https://279292c7-38a9-40e5-be1f-9c1b5c1e4faf.filesusr.com/ugd/87d215_15a365d580c34514a64c4575042c3498.pdf?index=true
    • https://6d982d11-c492-47a8-a5a4-a86530e223c4.filesusr.com/ugd/87b9a8_1bc0670f5c294d0c9292efcc78eb41a6.pdf?index=true
    • https://5fafd5d8-8a86-4848-a9ba-ea7565a86101.filesusr.com/ugd/87a178_bb19ce73ab8b4e5194fcc728dbeb2bf3.pdf?index=true
    • https://4e4fcc0b-1d87-4281-a441-cfb504eab9c2.filesusr.com/ugd/f1c748_30a7868e379e4d49a12ad22506e123bd.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0428/5281/0911/files/bootstrap_form_search_input.pdf
    • https://cdn.shopify.com/s/files/1/0449/2158/5831/files/jiwefudosuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/8145/7061/files/807970565.pdf
    • https://cdn.shopify.com/s/files/1/0433/9728/3992/files/zudajuwadefozosanore.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5366/files/beravivu.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f18.bin
b273f64952d4fda53a7c7da483d5f825d26885474267d657400eff1940b07f60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F18 5572 bytes
font_01_sfnt_off0000621f.bin
551ae2e05a72c017a8afabdaf0d57e63db85d084e2fa4a919f014337011e5835		 pdf-font-stream PDF embedded font (sfnt) at offset 0x621F 10228 bytes

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