Malicious PDF — malware analysis report

Static analysis result for SHA-256 330661cbdb7166a2…

MALICIOUS

PDF

41.0 KB Created: 2020-08-10 01:13:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71a2818d87b486f40e9b5c5ebe54de5e SHA-1: cbbc465d375448c62dc7cdd29885e8e2e0152e5e SHA-256: 330661cbdb7166a2433b5a3d7bb45ac8961509df5962877af3a746e034bc1669
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to what appears to be a link farm designed for SEO manipulation. One prominent URL, https://ttraff.ru/pify?keyword=benefits+of+afforestation+pdf, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to the same lure text and URLs, indicating an attempt to drive traffic to malicious infrastructure.

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=benefits+of+afforestation+pdf
    • http://nukigutor.supercami.com/uploads/1/3/0/7/130775403/8939433.pdf
    • http://pefot.potss.co.uk/uploads/1/3/1/4/131483138/ccd771.pdf
    • http://files.perthcommunitychoir.com/uploads/1/3/0/7/130775949/xalolaxifagi.pdf
    • http://files.allgranitesarasota.com/uploads/1/3/1/3/131378776/zoxasutuvara.pdf
    • https://cdn.shopify.com/s/files/1/0430/9978/3319/files/66357167486.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21800621301.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2426/files/ximeloletosaxobafolu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9416/3109/files/surasiluru.pdf
    • https://cdn.shopify.com/s/files/1/0437/4704/9621/files/thoracic_epidural_anesthesia.pdf
    • https://cdn.shopify.com/s/files/1/0432/4101/3412/files/folisegezisukalasabifi.pdf
    • https://cdn.shopify.com/s/files/1/0434/9899/5864/files/29624096947.pdf
    • https://cdn.shopify.com/s/files/1/0431/1685/5457/files/60334634665.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/48599272906.pdf
    • https://cdn.shopify.com/s/files/1/0433/2807/7992/files/91802139645.pdf
    • https://cdn.shopify.com/s/files/1/0428/9911/2095/files/68582790340.pdf
    • https://cdn.shopify.com/s/files/1/0433/5281/7832/files/25021274888.pdf
    • https://cdn.shopify.com/s/files/1/0428/5720/1820/files/demifagufetojebin.pdf
    • https://cdn.shopify.com/s/files/1/0430/5489/1161/files/ford_8n_parts.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_off0000659a.bin
c9ee064a2c53f68714fbf7202d22b48a0a202b0168151b74c5f61e7a99ad7842		 pdf-font-stream PDF embedded font (sfnt) at offset 0x659A 5052 bytes
font_01_sfnt_off000076dd.bin
162e48f9b061167fa84fd658e5a5ed94e346f797e576562f81b109dfb03118c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76DD 9372 bytes

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