Malicious PDF — malware analysis report

Static analysis result for SHA-256 b334930b8f6f027e…

MALICIOUS

PDF

48.9 KB Created: 2020-07-29 20:58:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ccb55cf4d447b7a927dcbc9c21a0e68 SHA-1: 5486857b1cae24a76974adaf2af61bf97498dab3 SHA-256: b334930b8f6f027e4bce2bf2ea6762a9f4e06432fcec5a383fff51c7191c7d90
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, appears to be a lure related to a 'fluid mechanics book pdf'. The presence of numerous external links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to drive traffic to malicious sites. The ML classifier also strongly indicated maliciousness.

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/wb?keyword=fluid%20mechanics%20book%20pdf%20by%20rk%20rajput
    • http://files.sexualwellnessinstitute.com/uploads/1/3/1/3/131383821/loxebotebare.pdf
    • http://files.thesilkfamilyproject.com/uploads/1/3/1/4/131437740/livig.pdf
    • http://files.one5collective.com/uploads/1/3/1/8/131857270/sisepapojigiben-wufaveput-felusul.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/31233646794.pdf
    • https://cdn.shopify.com/s/files/1/0437/9744/6818/files/86620056508.pdf
    • https://cdn.shopify.com/s/files/1/0433/3004/4062/files/vurigesoruki.pdf
    • https://cdn.shopify.com/s/files/1/0431/4716/5850/files/5705574669.pdf
    • https://cdn.shopify.com/s/files/1/0438/3798/0834/files/fotukenekijove.pdf
    • https://cdn.shopify.com/s/files/1/0431/4333/2000/files/66075660577.pdf
    • https://cdn.shopify.com/s/files/1/0435/6849/6798/files/42689268870.pdf
    • https://cdn.shopify.com/s/files/1/0431/6990/6852/files/29277218522.pdf
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/vinutexiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/1713/4502/files/gezesifogoxuxoremezim.pdf
    • https://cdn.shopify.com/s/files/1/0433/2008/2590/files/boxomixugok.pdf
    • https://cdn.shopify.com/s/files/1/0434/6544/1430/files/pedogana.pdf
    • https://cdn.shopify.com/s/files/1/0434/4777/9478/files/5757402137.pdf
    • https://cdn.shopify.com/s/files/1/0431/6410/6901/files/66671350995.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/
    • https://cdn.shopify.com/s/files/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006962.bin
14d62bb451e256cb7213c4f4219fc5f25888c8dd9094b0a9523ba2124a583aed
pdf-font-stream PDF embedded font (sfnt) at offset 0x6962 5612 bytes
font_01_sfnt_off00007c3e.bin
33d80b5e357abfa3ea91f5eff18928953f8e36d8e9a7aea158c838e8ae756dd9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C3E 2116 bytes
font_02_sfnt_off00008608.bin
7d726e7f5da2bf774fa91e6fc9b97de81b69742162cfd9fae5e33c617ef01efd
pdf-font-stream PDF embedded font (sfnt) at offset 0x8608 15008 bytes