Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdceb0369292dcaf…

MALICIOUS

PDF

47.7 KB Created: 2020-08-30 04:50:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bde1f01dc0843091ded4b8ff2b26b403 SHA-1: 093cd8837a693c54d24dc8c8ebda48534e4b7e1d SHA-256: bdceb0369292dcafe308eddc6f488644db7725311e8d3fe2a701df764dd966eb
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 link farm. The embedded URLs, particularly the one pointing to 'ttraff.com', are indicative of a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the suspicious URL.

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/wix?keyword=phineas+and+ferb+act+your+age+galler
    • https://cdn.shopify.com/s/files/1/0429/2725/9811/files/bagurufanoxoxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3707/3314/files/creative_writing_topics_for_grade_8.pdf
    • https://cdn.shopify.com/s/files/1/0437/6382/6849/files/mafogusibolo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7872/0414/files/36101139220.pdf
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/41064881247.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66689816557.pdf
    • https://cdn.shopify.com/s/files/1/0440/4012/6614/files/saboso.pdf
    • https://cdn.shopify.com/s/files/1/0438/5941/1104/files/87339756022.pdf
    • https://cdn.shopify.com/s/files/1/0463/5371/1266/files/benefesuw.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/tipos_de_energas_alternativas.pdf
    • https://static.usrfiles.com/ugd/b8c837_da02d44ab6c44ed9abcf462c9b92f481.pdf
    • https://static.usrfiles.com/ugd/3f80ec_4978e40e7cc84312b57b412016cfa28e.pdf
    • https://static.usrfiles.com/ugd/b8c837_d26cb12c52a44130914d4c5577b4c534.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_off00007c94.bin
1780f9b07543b75d55fd92bd8a35b0a6279a23dd669c89e52d626269936b6348		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C94 5524 bytes
font_01_sfnt_off00008f4c.bin
76be5bafef938f6ac152d3fcf5604d0633142a6b447f9245c979d9896b0b46ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F4C 10240 bytes

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