Malicious PDF — malware analysis report

Static analysis result for SHA-256 c69aeead6c557a80…

MALICIOUS

PDF

39.4 KB Created: 2020-08-08 20:51:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b9f87825682f51637c378311bba907d SHA-1: 0b11145ccd8815eaf65d616f2397384aa36a5f37 SHA-256: c69aeead6c557a8056fabd606ebdee6ceca7545bc57534d2611d53e41275586a
128 Risk Score

Malware Insights

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

The PDF contains numerous links, including one identified as a malicious redirector at 'https://ttraff.com/pify?keyword=8th+grade+algebra+1+textbook+pdf'. The document body, though heavily obfuscated, contains text suggesting it is a textbook, which is a common lure. The presence of a 'download button' heuristic further supports the idea that the document is designed to trick users into clicking malicious links.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=8th+grade+algebra+1+textbook+pdf
    • http://vedizu.backroadsportraitcompany.com/uploads/1/3/0/7/130775403/6789081.pdf
    • http://files.riihannonwilde.com/uploads/1/3/2/6/132695620/9567620.pdf
    • http://mojiwaru.chicagolandboxers.com/uploads/1/3/0/8/130814575/kakig_kokuwobod_mobikuwew_wowixevis.pdf
    • http://files.bishopbutler.org/uploads/1/3/0/9/130969982/2269041.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/86892908031.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/voxetevew.pdf
    • https://cdn.shopify.com/s/files/1/0431/7777/1164/files/sesol.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/51989800801.pdf
    • https://cdn.shopify.com/s/files/1/0433/9728/3992/files/60703030955.pdf
    • https://cdn.shopify.com/s/files/1/0429/5393/2966/files/gebixuwinulubak.pdf
    • https://cdn.shopify.com/s/files/1/0431/2068/9306/files/soxuvovixivaxuduja.pdf
    • https://cdn.shopify.com/s/files/1/0439/0620/3803/files/introduction_to_statistical_quality_control_7th_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0432/9360/6046/files/goforazezexuselow.pdf
    • https://cdn.shopify.com/s/files/1/0441/2401/2696/files/94388944881.pdf
    • https://cdn.shopify.com/s/files/1/0428/6555/7671/files/anatoma_del_nervio_facial.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1348/files/donigonokuzovugogop.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_off0000599d.bin
2b986c891a56edb1611eaf0c55d7e0d7b885607da57c2ee99051d85c23c0e2d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x599D 5548 bytes
font_01_sfnt_off00006c7e.bin
62379fdf17885df7e9480fdf8f085615973e8aed8e73ed7f70d68ab6d3f9f15c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7E 10720 bytes