Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e9d898fc6905478…

MALICIOUS

PDF

42.2 KB Created: 2020-08-07 00:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b53abd150e9ce50db50dcc96814b557e SHA-1: 0b7028fafadb63105c5f97bbea8db799e6a055c2 SHA-256: 9e9d898fc6905478df58759266d3ef502a723875764541e1a1c7488c54501bc3
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 of which point to Shopify domains hosting other PDFs, forming a link farm. One of these links, 'https://ttraff.ru/wb?keyword=prefixes%20and%20suffixes%20quiz%20worksheet', is flagged as a malicious redirector. This suggests the document is designed to lure users to malicious sites, likely for further exploitation or phishing.

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.ru/wb?keyword=prefixes%20and%20suffixes%20quiz%20worksheet
    • http://files.empoweringradiance.com/uploads/1/3/0/7/130775515/5290744.pdf
    • http://ludavo.capitolroofingservices.com/uploads/1/3/1/4/131438216/3622294.pdf
    • http://files.tiloscleanwater.com/uploads/1/3/1/4/131437172/6997362.pdf
    • http://files.marthastjean.com/uploads/1/3/1/8/131856476/9259830.pdf
    • http://files.positive-matters.org/uploads/1/3/1/3/131383949/e58b7fd9b589.pdf
    • https://cdn.shopify.com/s/files/1/0428/0310/1863/files/41545205569.pdf
    • https://cdn.shopify.com/s/files/1/0430/4335/6821/files/99820838680.pdf
    • https://cdn.shopify.com/s/files/1/0437/2201/4870/files/komonifibubulajavajina.pdf
    • https://cdn.shopify.com/s/files/1/0447/8690/9341/files/durga_saptashati_lyrics_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/foxojukizabovejewini.pdf
    • https://cdn.shopify.com/s/files/1/0431/1223/5174/files/gurepovusu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5313/8591/files/8322534106.pdf
    • https://cdn.shopify.com/s/files/1/0428/8924/8924/files/duzapitesexi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/33603544316.pdf
    • https://cdn.shopify.com/s/files/1/0434/3257/5132/files/rexaxumizawivajomubi.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_off00005969.bin
e463b9bf468cbf505daad45beb4b09e56e0752015b64d16a7cb3c34664596d87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5969 5248 bytes
font_01_sfnt_off00006b47.bin
e7f7059e2e7b9b33da3f241e75dd2f38e7cc6f0f7188bf03feb77f23c15bdd88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B47 10192 bytes
font_02_sfnt_off00008deb.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DEB 4324 bytes

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