Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb90e88a3d5acfb1…

MALICIOUS

PDF

57.3 KB Created: 2020-08-11 12:28:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbdf2ea935991bb0d4d9606fbb6f3ba8 SHA-1: 153c89013af1cfcc6f63f686fc649b508a3f783f SHA-256: bb90e88a3d5acfb12b39bdc7c92804d78fa74cd1ef7abe5ed2fe491e78b6b370
160 Risk Score

Malware Insights

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

The PDF contains a lure promising a free download of 'Biopsychology 10th edition pdf free download'. It includes a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The PDF also contains a large number of external links, suggesting a link farm for SEO manipulation, as flagged by PDF_SEO_LINK_FARM. The SE_BROWSER_INSTALL_LURE heuristic indicates the document likely prompts the user to install a browser extension or update, a common tactic for malware delivery or credential theft.

Heuristics 4

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/pify?keyword=biopsychology+10th+edition+pdf+free+download
    • http://files.rbsm.me.uk/uploads/1/3/0/7/130776072/fapomomewa_dagavu_rolixinazusos_ziresono.pdf
    • http://files.tabernaclebaptistchurchofhope.org/uploads/1/3/2/6/132681443/4732471.pdf
    • http://files.absolutelyradiantphotography.com/uploads/1/3/0/8/130874043/1466827.pdf
    • http://files.hengjieai.com/uploads/1/3/0/8/130874457/xusoliva.pdf
    • http://files.pulsarevent.com/uploads/1/3/0/8/130874134/9214878.pdf
    • https://cdn.shopify.com/s/files/1/0433/9246/7109/files/faxulonuxababeluzizu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5734/7741/files/parowekudapijemip.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56655156305.pdf
    • https://cdn.shopify.com/s/files/1/0437/7811/3697/files/vaxigenigorogukomigi.pdf
    • https://cdn.shopify.com/s/files/1/0437/5969/8077/files/gixiranegawapek.pdf
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/34801983166.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/29587736681.pdf
    • https://cdn.shopify.com/s/files/1/0430/4352/0666/files/88030490322.pdf
    • https://cdn.shopify.com/s/files/1/0449/0297/3595/files/98909997501.pdf
    • https://cdn.shopify.com/s/files/1/0436/6427/7657/files/tudodiwofepo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/boiler_control_system.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9221/files/jewelanefolajerovubikuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/8518/5702/files/rheem_furnace_troubleshooting.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_off00009db3.bin
ae14a701b6933850e2b96c2d14002fd99b392d456358cd6f0f3e2761e77bc156		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DB3 5856 bytes
font_01_sfnt_off0000b1a8.bin
71f26e97d53513794349f511adc1537e40007e48215f790b130a3742079b3fc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1A8 11168 bytes

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