Malicious PDF — malware analysis report

Static analysis result for SHA-256 84ff4f8f9eae15af…

MALICIOUS

PDF

43.9 KB Created: 2020-08-10 06:41:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 840a6511e874efd1fc46b0f4d3ef910e SHA-1: 57c04d157b46a2e7ad1e45e34d61c456dafb5ee2 SHA-256: 84ff4f8f9eae15af0e09c8cfb2033aa537780e89351adef8bd1d76f5ce83a5b2
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector. This suggests the PDF is designed to lead users to malicious content via a link farm.

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.cc/pify?keyword=understanding+the+mathematics+of+personal+finance+pdf
    • http://files.whitneydavisliterary.com/uploads/1/3/1/4/131408970/susanube.pdf
    • http://files.nebraskansunitedforthegoodlife.net/uploads/1/3/0/7/130776409/tikivog-gazevi.pdf
    • http://files.earlgrenvillekilleenart.com/uploads/1/3/2/7/132741109/e89df.pdf
    • http://files.scholasticmarchingbands.com/uploads/1/3/1/8/131872198/20fd3ee0ca.pdf
    • https://cdn.shopify.com/s/files/1/0435/7786/8443/files/nasagijejuxobiwupumafo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5213/7622/files/jilesuvepexagetevivo.pdf
    • https://cdn.shopify.com/s/files/1/0439/0954/6136/files/rifokero.pdf
    • https://cdn.shopify.com/s/files/1/0435/8062/0955/files/cambridge_english_prepare_level_4.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53293114795.pdf
    • https://cdn.shopify.com/s/files/1/0430/8090/8949/files/fapokupuwonaxipifabuzikep.pdf
    • https://cdn.shopify.com/s/files/1/0433/5792/9621/files/forababewoxogoxuvufewu.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/lixumezegi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7344/5792/files/70417193487.pdf
    • https://cdn.shopify.com/s/files/1/0433/5838/8383/files/1022661189.pdf
    • https://cdn.shopify.com/s/files/1/0432/2508/8168/files/2835739781.pdf
    • https://cdn.shopify.com/s/files/1/0433/8683/0998/files/letuwolibejo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3876/0342/files/59981259790.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_off00006b83.bin
eda413bbaa1a101fc28e6d8de61a3cd981e84a332f055c8238e734ea28bb7742		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B83 5560 bytes
font_01_sfnt_off00007e4b.bin
553d3c6d286122faa2e4b66213625c6ff39b85246455b7631a7876865cf71be8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4B 10512 bytes

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