Malicious PDF — malware analysis report

Static analysis result for SHA-256 87cd35f2fab04ee8…

MALICIOUS

PDF

46.6 KB Created: 2020-08-11 04:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43d0f146869b7b7a50e42899563fdf42 SHA-1: 193b7f1e0fbeceb56f7fdc139c3e4f96512252b4 SHA-256: 87cd35f2fab04ee88a2c5cfe7eef4870da621838117d6e0f526fbbd9c573febf
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=seamless+pipe+chart+pdf', suggesting a lure to a malicious site. The presence of numerous Shopify links, while mostly benign, contributes to the link farm characteristic.

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=seamless+pipe+chart+pdf
    • http://files.ashleighmanning.com/uploads/1/3/0/7/130776828/fawefeto.pdf
    • http://files.sjutsscience.com/uploads/1/3/1/4/131408528/gogosovunejipuke.pdf
    • http://files.holgerloodus.net/uploads/1/3/1/4/131406985/sotorivezubokor.pdf
    • http://files.ashleighmanning.com/uploads/1/3/0/7/13
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/tesadajetusunaje.pdf
    • https://cdn.shopify.com/s/files/1/0437/6064/8343/files/tawexa.pdf
    • https://cdn.shopify.com/s/files/1/0433/6526/9669/files/campbell_biology_11th_edition_etextbook.pdf
    • https://cdn.shopify.com/s/files/1/0436/1394/6018/files/guwebefukelusa.pdf
    • https://cdn.shopify.com/s/files/1/0441/2165/3400/files/69027532441.pdf
    • https://cdn.shopify.com/s/files/1/0434/0839/2353/files/miracle_shake_ed.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/65326233819.pdf
    • https://cdn.shopify.com/s/files/1/0429/7215/1959/files/vebim.pdf
    • https://cdn.shopify.com/s/files/1/0446/4531/8819/files/pearson_verbal_ability.pdf
    • https://cdn.shopify.com/s/files/1/0428/7945/1289/files/safety_equipment_on_board.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_off00006def.bin
a1bd7cec533a4775aeeefc6d7daa4e77233fd0b8834bb1c8c9bbc6633722e22d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEF 5500 bytes
font_01_sfnt_off0000806e.bin
4db31614e3009ff0e9c5b7ac0238c4bc0b71f4ff4c1643973b49a3487f024e1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x806E 14660 bytes

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