Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c8f9d848a59d31c…

MALICIOUS

PDF

43.2 KB Created: 2020-08-19 12:40:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d1585b7bfb40a79c1cf9592a7d9e591 SHA-1: 6fff6e438b75133863abf504750bba4046e8ae2a SHA-256: 1c8f9d848a59d31c989d23faf08f85af55c68dd59e3aa7300d980a201c8ced6a
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=audio+visualizer+template+free'. The document body also contains this URL, suggesting it is the primary lure. The file also exhibits characteristics of a link farm, with numerous embedded links to Shopify-hosted PDFs, likely for SEO manipulation to increase visibility. The primary malicious link is the most critical IOC.

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.cc/pify?keyword=audio+visualizer+template+free
    • http://files.milbur.org/uploads/1/3/0/7/130738696/timevekebo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1941/files/giputuzelorupugew.pdf
    • https://cdn.shopify.com/s/files/1/0432/5208/9000/files/milekufopupuda.pdf
    • https://cdn.shopify.com/s/files/1/0434/2222/0439/files/how_to_delete_tumblr_blog.pdf
    • https://cdn.shopify.com/s/files/1/0431/7229/8913/files/48166059811.pdf
    • https://cdn.shopify.com/s/files/1/0432/3944/0543/files/70169269847.pdf
    • https://cdn.shopify.com/s/files/1/0433/7208/5406/files/bedefif.pdf
    • https://cdn.shopify.com/s/files/1/0428/8764/3302/files/18903872083.pdf
    • https://cdn.shopify.com/s/files/1/0439/3595/7147/files/adobe_converter_free_download_for_windows_7_64_bit.pdf
    • https://cdn.shopify.com/s/files/1/0429/6540/1753/files/nekozususawuza.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_off00005e5f.bin
fb293cec2eee796e26dd701ccac2e3225a6328c9acd3eb308c957c4c25723f1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5F 5064 bytes
font_01_sfnt_off00006fa6.bin
1de8256a10e81ea02519112bfdaf2ea53f87e1caa041b0dc0cfc186be6e4c03f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA6 10216 bytes
font_02_sfnt_off00009287.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9287 4324 bytes

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