Malicious PDF — malware analysis report

Static analysis result for SHA-256 58cd964045c1ba0e…

MALICIOUS

PDF

41.8 KB Created: 2020-07-22 04:03:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b72a6ab5cc24e01bea8f6a3d4db46f6b SHA-1: 59d68524fd38e1d0825abfe39c4ca387bde9e4fa SHA-256: 58cd964045c1ba0e6de1430b6e77aa4998fe1a08d3de577978df7eb076c55b83
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell T1059.003 Windows Command Shell

The PDF contains numerous links, including one to a known malicious redirector (ttraff.cc). This redirector is likely used to obscure the final destination and potentially deliver a malicious payload. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility and lure victims. The ML classifier strongly indicates 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.cc/wb?keyword=classification%20of%20living%20things%20quiz%20pdf
    • http://files.prmueller.co.uk/uploads/1/3/0/7/130739835/kiduzabamarite.pdf
    • http://files.mothersforothers.org/uploads/1/3/1/0/131071067/9f748ceb5fa0db.pdf
    • http://files.ahlivintage.com/uploads/1/3/1/4/131406403/3233322.pdf
    • http://files.stlukeshhi.org/uploads/1/3/0/7/130739052/3d14d6f.pdf
    • https://cdn.shopify.com/s/files/1/0429/6117/4684/files/fegeliditeti.pdf
    • https://cdn.shopify.com/s/files/1/0432/9055/8622/files/73684088913.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2033782386.pdf
    • https://lufafoga.files.wordpress.com/2020/07/66387547660.pdf
    • https://molejupo.files.wordpress.com/2020/06/65444392783.pdf
    • https://jowoxub.files.wordpress.com/2020/07/mofafok.pdf
    • https://cdn.shopify.com/s/files/1/0431/5850/3573/files/99252691385.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/satofekefekuwozavobijogut.pdf
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/tewobakilixozelirifo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zudofujavulasosajawigubi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1346/files/bevonilodo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5458/0391/files/xesalu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fixasitisajixumazurezeve.pdf
    • https://cdn.shopify.com/s/files/1/0431/9045/2385/files/bozokoponezonufasanaze.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_off000064ca.bin
7b2755640126d8f4e93b56eddab009d5ecfe9ec6790811528f3822d25847ca65
pdf-font-stream PDF embedded font (sfnt) at offset 0x64CA 5344 bytes
font_01_sfnt_off000076f4.bin
4ed4f998d96972b167a2a3720b88eebcfc3fee5d9c9129ee1177ac2693d67924
pdf-font-stream PDF embedded font (sfnt) at offset 0x76F4 10216 bytes