Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7b4688f568a8c7a…

MALICIOUS

PDF

55.6 KB Created: 2020-08-12 12:17:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 859f2a12d4cbb83c85f826affd002460 SHA-1: 4e695d2a151b4d2f6f8c43105151b0675dbfc4cf SHA-256: b7b4688f568a8c7aca917e1c339236317c15eefd56d1dcd7743e2a3c82b066f8
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains and one critical link to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=dictionary+english+to+bangla+pdf+download, suggesting a lure to download a dictionary PDF. This link likely leads to further malicious content or phishing pages.

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/pify?keyword=dictionary+english+to+bangla+pdf+download
    • http://files.uhsjcl.com/uploads/1/3/1/6/131606819/bolinopanajovemir.pdf
    • http://files.jbirdmultisportcoaching.com/uploads/1/3/0/8/130873877/27e66b.pdf
    • http://files.theologythatsings.com/uploads/1/3/0/8/130813934/ba00c8c8d81c4.pdf
    • https://cdn.shopify.com/s/files/1/0429/0697/6422/files/48273600379.pdf
    • https://cdn.shopify.com/s/files/1/0441/4459/1000/files/dapixuzarefidesusezijem.pdf
    • https://cdn.shopify.com/s/files/1/0449/2853/2635/files/nike_brand_positioning.pdf
    • https://cdn.shopify.com/s/files/1/0434/3378/7542/files/coenzyme_structure_and_function.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/34807585828.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6896/files/64358666030.pdf
    • https://cdn.shopify.com/s/files/1/0438/4836/8288/files/dijukexukaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/2703/8359/files/89244820768.pdf
    • https://cdn.shopify.com/s/files/1/0430/9935/7338/files/calendario_diciembre_2020_para_imprimir.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/juxupajajivamuwiri.pdf
    • https://cdn.shopify.com/s/files/1/0433/6723/5742/files/danica_mckellar_books.pdf
    • https://cdn.shopify.com/s/files/1/0435/0096/1947/files/42417824923.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bizisumexu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/togobusilirozekilajez.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006617.bin
bc05b0ef9876883c370c13cdb78e94b290d81f451668a2d89f5a7b74fbf61e53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6617 5748 bytes
font_01_sfnt_off000079b3.bin
680f4d3959e576a5793ba0508809b4e66b872beaecfc634568e910b699274493		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79B3 10044 bytes
font_02_sfnt_off0000988c.bin
940701bf1ee2675aff1d9dc78a8e86e45018915d45f4eaf5d4ff6d2b3126a861		 pdf-font-stream PDF embedded font (sfnt) at offset 0x988C 10212 bytes
font_03_sfnt_off0000bbd1.bin
ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBD1 16092 bytes

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