Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a81e2351dd4c9ce…

MALICIOUS

PDF

41.0 KB Created: 2020-08-26 19:12:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 033d0f274c580b374f88ffce5e2ec9d1 SHA-1: 199fd56955c2584fc422c32b41a725a6923c45eb SHA-256: 1a81e2351dd4c9ce36cf2b624e77402f5d48b0865e1beb56a1ad212024131417
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one heuristic specifically identifying it as a PDF link farm. The primary malicious URL, 'https://ttraff.club/pify?keyword=creepy+crawlers+bug+maker+1960%2527s', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and URLs, further supporting a malicious intent.

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.club/pify?keyword=creepy+crawlers+bug+maker+1960%2527s
    • http://wafaged.marathondelimd.com/uploads/1/3/1/8/131856257/186982.pdf
    • https://cdn.shopify.com/s/files/1/0430/0403/5221/files/akuntansi_biaya_full.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43034806536.pdf
    • https://cdn.shopify.com/s/files/1/0430/9185/3479/files/65285678859.pdf
    • https://cdn.shopify.com/s/files/1/0430/1688/0281/files/mujimunaluvufugazi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7084/9181/files/81587777703.pdf
    • https://cdn.shopify.com/s/files/1/0427/6014/3014/files/minapelukegewoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/6617/9230/files/makazib.pdf
    • https://cdn.shopify.com/s/files/1/0433/1651/0873/files/redinikimodexebigev.pdf
    • https://cdn.shopify.com/s/files/1/0439/7439/4014/files/greater_than_less_than_worksheets_for_grade_1.pdf
    • https://cdn.shopify.com/s/files/1/0439/4716/3806/files/24960953206.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_off00006099.bin
e03339994667b29a3a82d9b4f13c547d0d00350e629f673e8708cfc5cd93b267		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6099 6096 bytes
font_01_sfnt_off0000755b.bin
6f407a7e69aefd0de32547250783722e8cf9041945c7876b0a40fac8aef77ad2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x755B 9992 bytes

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