Malicious PDF — malware analysis report

Static analysis result for SHA-256 82d8b84e7d312071…

MALICIOUS

PDF

42.8 KB Created: 2020-08-16 00:18:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24ad3ae93b74383e98856b6a88096e9b SHA-1: 05bb91fdffc47b1cb5d6f2d87460e14da3aabb12 SHA-256: 82d8b84e7d31207163899cbbfb2aa8c111c96de9ec5077c29d70d01cfeb0bdd2
162 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link and a link farm, suggesting a social engineering lure. The document body text and embedded URLs indicate the lure is to install a 'PDF reader for PC apk'. The primary malicious URL is https://ttraff.cc/wb?keyword=pdf%20reader%20for%20pc%20apk, which likely leads to a malicious download or phishing page. The presence of numerous Shopify-hosted PDF links, while some are benign, contributes to the link farm tactic.

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/wb?keyword=pdf%20reader%20for%20pc%20apk
    • http://files.storyspinner.net/uploads/1/3/0/7/130775728/6c479c.pdf
    • http://files.nativeinstinct.co/uploads/1/3/1/4/131437563/5f97b61ae16.pdf
    • http://jexoreb.goplaysport.co/uploads/1/3/0/8/130814423/ccb4616.pdf
    • http://files.morganizephoto.com/uploads/1/3/1/4/131438313/dukijot-kurijol.pdf
    • https://cdn.shopify.com/s/files/1/0433/6392/6174/files/25789385395.pdf
    • https://cdn.shopify.com/s/files/1/0431/7937/6798/files/kibit.pdf
    • https://cdn.shopify.com/s/files/1/0434/3323/0488/files/cub_cadet_owners_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0432/8862/5302/files/32302145185.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1945/files/65836530752.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/ludowowaxigobapi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wowivitotorinu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/73908144961.pdf
    • https://cdn.shopify.com/s/files/1/0435/8206/2753/files/bijur.pdf
    • https://cdn.shopify.com/s/files/1/0434/3644/1752/files/boyce_diprima_differential_equations_10th_edition.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_off00006a3c.bin
c62ae8c9d9ebfc32e67db61ee2569786139dfcd2182a87cb954db583996992e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A3C 5004 bytes
font_01_sfnt_off00007b50.bin
8db144c298f7644dbb4239789caff78199c4d52c118ceb3a79c3ef343db21425
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B50 10372 bytes