Malicious PDF — malware analysis report

Static analysis result for SHA-256 f99466e0eb15cfad…

MALICIOUS

PDF

37.5 KB Created: 2020-08-10 16:02:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 712fb606f4b65523ac9ab69e6e5136a6 SHA-1: 6c3ef8c3a602f04a1b7a5684ee80b9cd049685ec SHA-256: f99466e0eb15cfadc293c58ef20723a2d4beb8684e7ec4be0e034011858c85f1
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is used to obscure the final destination. The document body, though heavily obfuscated, also contains the URL for the redirector, suggesting an attempt to lure users into clicking through to a potentially harmful site.

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=comparative+and+superlative+adverbs+exercises+with+answers+pdf
    • http://files.rodanthesurfshop.com/uploads/1/3/1/3/131384256/9756209.pdf
    • http://files.lightworkselectricny.com/uploads/1/3/1/4/131453432/pedobanuvusekamamil.pdf
    • http://jativ.evelethheritage.com/uploads/1/3/1/4/131409090/4f6ff42bef7.pdf
    • https://cdn.shopify.com/s/files/1/0431/8271/9136/files/towuvuxudutodidulafep.pdf
    • https://cdn.shopify.com/s/files/1/0430/7792/7072/files/vonev.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2934473971.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jikoleluvotejagumali.pdf
    • https://cdn.shopify.com/s/files/1/0432/7302/7749/files/palegezixaxokuda.pdf
    • https://cdn.shopify.com/s/files/1/0434/9159/0308/files/41959305697.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xumilegimazuguvabunozanik.pdf
    • https://cdn.shopify.com/s/files/1/0436/1748/4957/files/pierwotna_endoprotezoplastyka_stawu_kolanowego.pdf
    • https://cdn.shopify.com/s/files/1/0428/9229/6359/files/tennessee_tuxedo_and_his_tales.pdf
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/5464016919.pdf
    • https://cdn.shopify.com/s/files/1/0440/8963/9077/files/74423722035.pdf
    • https://cdn.shopify.com/s/files/1/0428/3976/9254/files/woripi.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_off000052d8.bin
37e131d6ba80dda4c2887ab2d8c7be8c7e1709c7a7f4706c0fbfa09b7d1bfcbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52D8 5660 bytes
font_01_sfnt_off000065f7.bin
851e046882220665d9595c3e6afe0266931a8b6092e4e1c64dfc1ee8edad3b43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F7 10220 bytes

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