Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecef7b00279d143f…

MALICIOUS

PDF

45.6 KB Created: 2020-08-01 04:05:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 920727748df1968617190c9a01da773d SHA-1: 304d40bf480b9b4bfb710beeff58fa12f16fe403 SHA-256: ecef7b00279d143fc08c34c5d1b7a188f8135acef154de95ef84271f0c6fa623
120 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. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for a book download. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm intended to improve search engine ranking for malicious content. No scripts were extracted from this sample.

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/pify?keyword=understanding+operating+systems+7th+edition+pdf+download
    • http://files.myjanniejewels.com/uploads/1/3/1/6/131607029/gakiruzaratipenixono.pdf
    • http://files.mylifeintechnicolor.com/uploads/1/3/1/4/131409794/teropupapesa.pdf
    • http://files.eeutah.org/uploads/1/3/1/8/131872055/roxevuvamurikeguv.pdf
    • http://files.cluesescaperoom.com/uploads/1/3/2/6/132696558/nimuratup.pdf
    • http://files.sawtoothmountaincider.com/uploads/1/3/1/4/131437671/3063207.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2813/files/94627220173.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/wodiparip.pdf
    • https://cdn.shopify.com/s/files/1/0434/7969/5517/files/vanizex.pdf
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/wapapunuziguve.pdf
    • https://cdn.shopify.com/s/files/1/0430/6288/6551/files/92551957881.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/94099923579.pdf
    • https://cdn.shopify.com/s/files/1/0428/6310/0070/files/lifeb.pdf
    • https://cdn.shopify.com/s/files/1/0427/6859/7158/files/fenuwowidexaxukafogu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4769/0145/files/degaguzizafuwaxek.pdf
    • https://cdn.shopify.com/s/files/1/0428/5405/6092/files/dawidadazovunavesa.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_off0000732c.bin
f7d12fb159eb3911609c24020c671b30655f858a3e0ef8c5c7320284ce7e9ac0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x732C 5720 bytes
font_01_sfnt_off0000869a.bin
bf85b22820ca7d60f53a51cda126cec6fd26ac3898a65eabc108f29303f08edd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x869A 9928 bytes

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