Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e8f64916f30097d…

MALICIOUS

PDF

46.0 KB Created: 2020-08-13 21:19:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d8033126a96a95d7f9fae95ead362d0 SHA-1: 71bbc6558fab53393ffd202c228d6c0c3b379767 SHA-256: 4e8f64916f30097d814da94a44f40d4147d25276016be089ca41718b9a573952
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain, ttraff.com. This suggests a link farm or SEO poisoning tactic designed to drive traffic to malicious infrastructure. The document body, though heavily obfuscated, contains the malicious URL and references to product keywords, reinforcing the lure. No scripts were extracted, but the primary attack vector is the malicious redirector.

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/pify?keyword=100+bamboo+sheets+costco
    • http://files.kavelarisantiques.com/uploads/1/3/1/4/131407918/vajebixugosuwu.pdf
    • http://files.gentlehomeservices.com/uploads/1/3/1/1/131164358/2553ca.pdf
    • http://files.jj-recruiting.com/uploads/1/3/0/8/130874110/xisirol.pdf
    • https://cdn.shopify.com/s/files/1/0434/1320/9246/files/34368716804.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/juwekukiwufofeselip.pdf
    • https://cdn.shopify.com/s/files/1/0433/3387/7914/files/wumorudesifikedipu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3463/0554/files/61830696317.pdf
    • https://cdn.shopify.com/s/files/1/0430/3434/5625/files/shurflo_4008-_101-_a65.pdf
    • https://cdn.shopify.com/s/files/1/0433/6300/8661/files/54345220538.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zaxolaxowixinetubosi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5987/9841/files/norirojikisafodokonowi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6988/8929/files/good_morning_in_different_languages.pdf
    • https://cdn.shopify.com/s/files/1/0439/0230/4408/files/93312315463.pdf
    • https://cdn.shopify.com/s/files/1/0428/8859/3567/files/6214274828.pdf
    • https://cdn.shopify.com/s/files/1/0430/3483/7149/files/65377422412.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000678c.bin
703edf3a3a2789c76c82d8e86e01b75814cfd0444f742a97036ef4151ff8ca7a
pdf-font-stream PDF embedded font (sfnt) at offset 0x678C 4784 bytes
font_01_sfnt_off000077cb.bin
0187c60bab2ad85a3e011eaf2567a5148824b43e84db168deef525b0d2721d21
pdf-font-stream PDF embedded font (sfnt) at offset 0x77CB 11020 bytes
font_02_sfnt_off00009d14.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D14 4324 bytes