Malicious PDF — malware analysis report

Static analysis result for SHA-256 2811b9593657acdd…

MALICIOUS

PDF

46.3 KB Created: 2020-09-01 03:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84a87cbe40e8f6cf206834aa771a6a46 SHA-1: 4deeb28ecb8ec115bbaf808512f5641b2d8b4740 SHA-256: 2811b9593657acdd31feab93fca25819c960efdc34720bcab54a901fd7e035b8
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=birthday+wishes+images+for+husband'. This indicates an attempt to direct users to a potentially harmful website. The document body, though heavily obfuscated, also contains this URL, reinforcing its role as the primary lure. The presence of numerous external PDF links, while many are benign, suggests a link farm strategy to obscure the malicious destination.

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.com/wix?keyword=birthday+wishes+images+for+husband
    • https://static.usrfiles.com/ugd/6c032c_332b46cced504b5397f290e3dc27901c.pdf
    • https://static.usrfiles.com/ugd/b8c837_62efa845e940446e88105a7eda97732d.pdf
    • https://static.usrfiles.com/ugd/5ecadc_c740e5c37a9041e289add7e060122718.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/8439632543.pdf
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/96165863317.pdf
    • https://cdn.shopify.com/s/files/1/0439/7439/4014/files/2496709589.pdf
    • https://cdn.shopify.com/s/files/1/0451/0954/3077/files/warhammer_40k_codex_download.pdf
    • https://cdn.shopify.com/s/files/1/0463/3523/0114/files/dixutakibiz.pdf
    • https://static.usrfiles.com/ugd/136d07_9ad11210940046c7b0996a05d235380c.pdf
    • https://static.usrfiles.com/ugd/cafc24_bafa7bd78ab7401fa30f5ca92865253e.pdf
    • https://static.usrfiles.com/ugd/8e1900_9dc94508995d451fb1a92a40450588f3.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_off000069b4.bin
5ea23c9f6ffead2a491a46ba9129317ac5aee86f5bc488cfd41042c40aabc3f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69B4 5556 bytes
font_01_sfnt_off00007c8a.bin
44d9193558699efdee3436d95f6b315838fb04900be6689ab66b855c97ea1e97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C8A 9964 bytes
font_02_sfnt_off00009eb5.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EB5 4324 bytes

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