Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a82fdb359531d1b…

MALICIOUS

PDF

62.1 KB Created: 2020-08-08 22:25:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5558bc09d68f82f4c40415069366469e SHA-1: 3b5d9a6ce02abac47090e497f717cfa5130502dc SHA-256: 1a82fdb359531d1b150f4838a46ca29d8d5f3941261be40d5d6959eca786dd53
168 Risk Score

Malware Insights

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

The PDF file contains a lure to install a browser extension or update, a common social-engineering tactic. It also features a link farm with numerous external PDF links, one of which redirects to a known malicious URL. The document body, though heavily obfuscated, contains the malicious redirector URL, suggesting the primary goal is to lead the user to malicious infrastructure.

Heuristics 5

  • 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
  • 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=acrobat+reader+reduce+pdf+file+size
    • http://files.evergreenstoke.co.uk/uploads/1/3/1/4/131483327/bc40790b8164538.pdf
    • http://files.newleaforganizingllc.com/uploads/1/3/1/8/131857071/6418065.pdf
    • http://files.kaiseribdp.org/uploads/1/3/1/4/131407423/letadubujal.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/vamoxipexukazenuweg.pdf
    • https://cdn.shopify.com/s/files/1/0440/6591/5045/files/ontology_philosophy_books.pdf
    • https://cdn.shopify.com/s/files/1/0431/4015/3505/files/jixilizawifezebosibumaje.pdf
    • https://cdn.shopify.com/s/files/1/0428/2892/3046/files/wugizep.pdf
    • https://cdn.shopify.com/s/files/1/0431/8052/3678/files/95997237892.pdf
    • https://cdn.shopify.com/s/files/1/0429/4203/8182/files/57161279273.pdf
    • https://cdn.shopify.com/s/files/1/0431/1125/2132/files/45697649112.pdf
    • https://cdn.shopify.com/s/files/1/0446/5029/9555/files/teas_v_study_guide_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/8049/8852/files/pufiro.pdf
    • https://cdn.shopify.com/s/files/1/0432/2577/6288/files/vumoxexivesedutiwopelala.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008325.bin
50759c40df67ec181331d37bc16259f4db20c39507a2c7d18444f96545433770		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8325 6424 bytes
font_01_sfnt_off00009305.bin
cc87fe0984345d8d2ddd78674e5245b07ff39ed8407ffce01efc219124a40cb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9305 5104 bytes
font_02_sfnt_off0000a46f.bin
61b2b6dbbb36259130aa38422778b10d0d774c4a3e98d86d3002e4cee47b0e2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA46F 10128 bytes
font_03_sfnt_off0000c763.bin
764fe263e68fd20aff2bbd96e69f5a400d440299d02096befa162391f913c7cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC763 16144 bytes
font_04_sfnt_off0000dc64.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC64 4324 bytes

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