Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ab8bb3cd2e931a0…

MALICIOUS

PDF

42.4 KB Created: 2020-08-01 17:50:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7714bfae74d1042153ea4aed7ef24200 SHA-1: f0452accc602493cc7ded3cdfa8877b3dbb53579 SHA-256: 4ab8bb3cd2e931a03cda5c171231ddbd38ff89d246168cb0bff0d0b7a81dd688
128 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic indicates a link to known malicious redirector infrastructure at ttraff.ru. The document body, though heavily obfuscated, contains the same redirector URL. This suggests the PDF is designed to funnel users through a chain of links, ultimately leading to a malicious destination.

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.ru/pify?keyword=santa+dancing+booth
    • http://files.piernetwork.org/uploads/1/3/1/6/131606789/teruji-pejirar-nilid-kidobaxebudulo.pdf
    • http://files.kevinsmuts.com/uploads/1/3/0/8/130874593/kazugajufoneg.pdf
    • http://files.unlvasce.com/uploads/1/3/1/4/131454238/nepenewagafog.pdf
    • http://files.northcoastwalkingtours.com/uploads/1/3/1/3/131378988/6336775.pdf
    • http://files.marissasboutique.com/uploads/1/3/2/7/132740275/97e87c3.pdf
    • https://cdn.shopify.com/s/files/1/0428/0729/6163/files/losepojuzajawav.pdf
    • https://cdn.shopify.com/s/files/1/0431/7786/9476/files/73640606078.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78649322563.pdf
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/wudurexorujatolumor.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/jowekebazakagino.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0368/files/mezigixijilubexinitagubo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/40274946225.pdf
    • https://cdn.shopify.com/s/files/1/0434/1350/4156/files/83294853869.pdf
    • https://cdn.shopify.com/s/files/1/0435/6728/4379/files/duwawudugepe.pdf
    • https://cdn.shopify.com/s/files/1/0433/6533/5190/files/34790004463.pdf
    • https://cdn.shopify.com/s/files/1/0435/3723/6119/files/44634170715.pdf
    • https://cdn.shopify.com/s/files/1/0440/8049/6792/files/24958022139.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_off000067fd.bin
c0b1a4d89ee8887630e4ceafff9ef7539b82893e016d527bc3493c21e2f9ee29
pdf-font-stream PDF embedded font (sfnt) at offset 0x67FD 5140 bytes
font_01_sfnt_off00007973.bin
bb0df2165c5bb72f95dd732cec7c11afbdc5002afc6950d0e39c60e275580e43
pdf-font-stream PDF embedded font (sfnt) at offset 0x7973 10288 bytes