Malicious PDF — malware analysis report

Static analysis result for SHA-256 25a4e68a128b455d…

MALICIOUS

PDF

39.8 KB Created: 2020-08-02 20:19:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 069c5c619a76e55d01a1694414037a20 SHA-1: b61fcc12b974942cc3ff7c993ecbb65ceb4e8512 SHA-256: 25a4e68a128b455d7fdca0ca3f1680c9fa53dd1040fe0ec7bf3e14c560603e7d
150 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 pointing to 'ttraff.ru'. This URL is associated with a link farm designed to distribute malicious PDFs, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The document body, though heavily obfuscated, contains the URL and keywords suggesting a lure for a specific manual, likely to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=john+deere+317+manual+pdf
    • http://files.pawneecityboe.com/uploads/1/3/1/1/131163780/5889051.pdf
    • http://files.chattahoocheechorus.com/uploads/1/3/1/1/131163691/719782.pdf
    • http://files.hightechtintplus.com/uploads/1/3/2/3/132302973/47aff28564.pdf
    • http://files.edwards-custom-upgrades.com/uploads/1/3/2/6/132680813/bizap-zugarejudovelak.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/dudobegedabonibokisal.pdf
    • https://cdn.shopify.com/s/files/1/0428/9173/9295/files/latux.pdf
    • https://cdn.shopify.com/s/files/1/0430/3699/9842/files/77620296151.pdf
    • https://cdn.shopify.com/s/files/1/0429/6183/0037/files/gokepexu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/dezanaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/vajowimejiwakikujapewonew.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pawatofamilafal.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28821374719.pdf
    • https://cdn.shopify.com/s/files/1/0434/9542/4165/files/silamifupozep.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/nuxezamuwiw.pdf
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/vipiwe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6763/7917/files/66845276314.pdf
    • https://cdn.shopify.com/s/files/1/0428/2168/1315/files/sozikutufewewibabanotoga.pdf
    • https://cdn.shopify.com/s/files/1/0430/5554/6517/files/romoxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7223/3376/files/49084888446.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_off000050b3.bin
afffc77daed453cef6e66ecc5077d8e9132af568bf3738620466a3c5cebcdca2
pdf-font-stream PDF embedded font (sfnt) at offset 0x50B3 5144 bytes
font_01_sfnt_off00006205.bin
361a6bc0ef528d3d908486cd22179423295aaae746408d9429a302f145dd875f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6205 9916 bytes
font_02_sfnt_off00008401.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8401 4324 bytes