Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7e5e2d38384be2e…

MALICIOUS

PDF

49.4 KB Created: 2020-08-07 20:46:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65b484c8787e861585d75f08d5e64a91 SHA-1: d5ccc0ab1b7f57614ea38035e70df52292f1a0cb SHA-256: e7e5e2d38384be2eeba3a4e3c12e2b68d1f274e454d9f1d206b26c1ee5d2c791
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one pointing to a known malicious redirector. The presence of a 'download button' heuristic and the embedded URL suggest a social engineering lure to trick the user into clicking the link. The document body, though heavily obfuscated, contains the malicious URL and other links that appear to be part of a link farm designed to improve search engine ranking for malicious content.

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.cc/pify?keyword=coordination+chemistry+notes+pdf
    • http://files.ailienvuong.com/uploads/1/3/0/8/130874050/bc3fc18e4f7c1db.pdf
    • http://files.holywaterbooks.com/uploads/1/3/0/7/130739061/2ef258569c40f.pdf
    • http://files.extensionslashnbrow.com/uploads/1/3/1/4/131455024/dirotezawuga_xobukirukile_banisujirenimeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/4319/1969/files/peboluzib.pdf
    • https://cdn.shopify.com/s/files/1/0431/7354/4093/files/99932645010.pdf
    • https://cdn.shopify.com/s/files/1/0436/6427/7657/files/stream_processing_with_apache_flink_github.pdf
    • https://cdn.shopify.com/s/files/1/0431/6728/5408/files/5232717478.pdf
    • https://cdn.shopify.com/s/files/1/0437/1247/9382/files/38002087135.pdf
    • https://cdn.shopify.com/s/files/1/0434/2890/5127/files/99509582913.pdf
    • https://cdn.shopify.com/s/files/1/0434/7287/9773/files/kafabukovizozegabepipi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7792/7072/files/pzo1135_horror_adventures.pdf
    • https://cdn.shopify.com/s/files/1/0429/4351/2732/files/82651291709.pdf
    • https://cdn.shopify.com/s/files/1/0434/4990/9415/files/72776210849.pdf
    • https://cdn.shopify.com/s/files/1/0435/5624/1557/files/lopifuk.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_off00006ce6.bin
d5f15e5190e1a46f6cf2cec3af5baf62983c4ff8f15011965ce975fdddc61e63
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE6 5276 bytes
font_01_sfnt_off00007eb0.bin
2790e758a490ea82b12df3ba66a97dc1965bd6c6859198836c577b8ebf3d926f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB0 14012 bytes
font_02_sfnt_off0000aa4d.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA4D 4324 bytes