Malicious PDF — malware analysis report

Static analysis result for SHA-256 e16fd6ff80d2a0a0…

MALICIOUS

PDF

39.9 KB Created: 2020-08-31 11:59:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b429f3a47a5fcd0a6f67ad645ec3acb SHA-1: c49486b0a02d951a98c47c0a1cd01e3c01f30604 SHA-256: e16fd6ff80d2a0a0434829ed151670b65ea4fe651a19d30887e80be4e47daf3c
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting a link farm. One of the embedded URLs, https://ttraff.cc/wix?keyword=stones+to+abbigale, is identified as a known malicious redirector. The document body, though heavily obfuscated, contains this URL and references to other PDFs hosted on Shopify, reinforcing the link farm tactic. The primary goal appears to be directing users to malicious content via these 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.cc/wix?keyword=stones+to+abbigale
    • https://cdn.shopify.com/s/files/1/0433/7932/7126/files/goniw.pdf
    • https://cdn.shopify.com/s/files/1/0429/8843/7655/files/xevogo.pdf
    • https://cdn.shopify.com/s/files/1/0435/8363/5619/files/57202764434.pdf
    • https://static.usrfiles.com/ugd/f63f29_c4d42e51f8714ac49c91bae261ade74e.pdf
    • https://cdn.shopify.com/s/files/1/0436/2154/8194/files/5569006243.pdf
    • https://cdn.shopify.com/s/files/1/0432/0883/5234/files/skripsi_kualitatif_akuntansi_perpajakan.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/34856015433.pdf
    • https://static.usrfiles.com/ugd/9374a7_c95f941882064c52b23ccb5b350ffc19.pdf
    • https://static.usrfiles.com/ugd/7f46b5_baef7af32a4541278517feb87c561f95.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_off00005fcd.bin
2364d8f1c30c1455eeddf2a8dd47803785986e4129213941d3c3207358d71abb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCD 5000 bytes
font_01_sfnt_off000070dc.bin
7017590b753a92c40da0f32e2d4c3756ec72fcb89011be962c8e60ad8c3f978d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70DC 10196 bytes

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