Malicious PDF — malware analysis report

Static analysis result for SHA-256 20cb1ec419f3b376…

MALICIOUS

PDF

42.8 KB Created: 2020-08-11 05:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8307e642134b34bf3b2aaae6d33257d SHA-1: f801ed26540b0ecdbcad86b7c461e05b4f5171c3 SHA-256: 20cb1ec419f3b376e5de9edbd870d9b956b2f37f714d1ff2b6e0ee4f7375c235
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 phishing or scam attempt designed to lead users to malicious infrastructure. The document body and metadata are consistent with a PDF generated by wkhtmltopdf, likely used to obfuscate the malicious links.

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=bookmark+pdf+chrome
    • http://files.ferretsandfriends.org/uploads/1/3/0/7/130774990/zovinem_befew_vizakimiri.pdf
    • http://julamatij.orangelaboxford.com/uploads/1/3/1/6/131637814/483859cd.pdf
    • http://tedodin.katherineinezmesa.com/uploads/1/3/0/7/130776811/lugozekolujukisuzena.pdf
    • http://files.saujs.co.za/uploads/1/3/2/6/132681824/8694376.pdf
    • https://cdn.shopify.com/s/files/1/0432/5516/9186/files/wibiwus.pdf
    • https://cdn.shopify.com/s/files/1/0433/2630/8510/files/90099374799.pdf
    • https://cdn.shopify.com/s/files/1/0430/7845/1351/files/vimizexowumi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0098/7811/files/13255171070.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dovaxetudomorunuk.pdf
    • https://cdn.shopify.com/s/files/1/0439/9208/8734/files/fepevipibufezofegar.pdf
    • https://cdn.shopify.com/s/files/1/0434/1648/6040/files/lekapu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8134/3900/files/66089594102.pdf
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/lukamipuzerofi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4599/4146/files/wolf_handbook_2017.pdf
    • https://cdn.shopify.com/s/files/1/0437/1942/6197/files/dogomoxo.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_off000068d6.bin
a3dffd07e57ef3197cf8262693efcda4a260786d0ccd7398b05ed1890b44079d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68D6 5296 bytes
font_01_sfnt_off00007abb.bin
ec6822332a09274bb3c805caee526b2b4767da9fd25415c59c2d58f282ac281e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABB 10816 bytes

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