Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b05ff94bfe788f4…

MALICIOUS

PDF

41.4 KB Created: 2020-08-22 15:21:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d65e9e8b5388bdb14e4b43bdb8115ea SHA-1: 464f4125bf811bd161bab97f5a4b199998118a72 SHA-256: 8b05ff94bfe788f4e181833359962241c7814148dffabbadd52a2ae68d020324
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF document contains a lure related to a 'South African history quiz' which directs the user to a malicious redirector URL. This redirector is likely part of a chain designed to deliver malware or facilitate credential theft. The presence of numerous links to PDFs hosted on various domains, including shopify, suggests a link farm or distribution network. The heuristic 'SE_BROWSER_INSTALL_LURE' further indicates a social engineering attempt to trick the user into installing unwanted software.

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.com/pify?keyword=south+african+history+quiz+questions+and+answers
    • http://befukola.iamcnola.org/uploads/1/3/0/8/130874276/2897580.pdf
    • http://files.cherylgrayfineart.com/uploads/1/3/2/3/132303077/ditujufexuripazewe.pdf
    • http://files.nigellasativacenter.com/uploads/1/3/2/6/132683088/02db50.pdf
    • http://files.erinreviewswine.com/uploads/1/3/1/4/131452778/2877599.pdf
    • http://files.mytoyaussie.com/uploads/1/3/2/7/132741144/e577fb.pdf
    • https://cdn.shopify.com/s/files/1/0435/7344/4767/files/38504183361.pdf
    • https://cdn.shopify.com/s/files/1/0435/8746/9469/files/zeguvibamosepo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3831/8487/files/tegujokukexevabewuzot.pdf
    • https://cdn.shopify.com/s/files/1/0431/8317/7885/files/fiporunogezusuje.pdf
    • https://cdn.shopify.com/s/files/1/0431/2691/5239/files/gifiwabopedufomevumolipi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9243/5359/files/35547901366.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/mufavekagejexanoker.pdf
    • https://cdn.shopify.com/s/files/1/0437/0979/2407/files/jekufekojuwi.pdf
    • https://cdn.shopify.com/s/files/1/0429/0805/7759/files/kelabovefiduj.pdf
    • https://cdn.shopify.com/s/files/1/0431/9900/4831/files/microelectronic_circuits_7th_edition_download.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_off000058a2.bin
14c45ac5eda4a6b6508c45f0a9f87e9a2bf8d2dade5c05f886fbf2ee27af6223
pdf-font-stream PDF embedded font (sfnt) at offset 0x58A2 5548 bytes
font_01_sfnt_off00006b8b.bin
f8d4148b6e46bc91798ffeec3a70ef9314c351a1087124f002ffbf348bbdba4a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B8B 2392 bytes
font_02_sfnt_off00007507.bin
5f9cd9f9addd35bcf47a50a2854d88e6e12e5b6abb52e12b001c4f375e2829d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7507 10296 bytes