Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f9d12ea74b23c37…

MALICIOUS

PDF

44.2 KB Created: 2020-08-18 15:39:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e26592d5dfd040e8f51241330cc3182 SHA-1: 4c48f170727f7001294a9b34bd1c9c8c8db235a0 SHA-256: 1f9d12ea74b23c3754c19b33e7cb6c41bfae0f67337438f8d2b23d13f7e5fa7c
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=noviform+augensalbe+5+bibrocathol'. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous embedded links to other PDF files, including 'https://cdn.shopify.com/s/files/1/0435/9720/1576/files/vazisu.pdf'. The document body, though partially corrupted, contains text related to the redirector's keyword and the file's creation tool, suggesting a deliberate attempt to disguise malicious content within a seemingly innocuous document.

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=noviform+augensalbe+5+bibrocathol
    • http://files.publicschools305.org/uploads/1/3/0/7/130776875/kofusijigefuvo.pdf
    • https://cdn.shopify.com/s/files/1/0435/9720/1576/files/vazisu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5153/2963/files/bedid.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bizem.pdf
    • http://guxufom.ccsboise.square.site/uploads/1/3/0/8/130874601/8c076a82c8e421.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ruketisoren.pdf
    • https://cdn.shopify.com/s/files/1/0431/1079/3370/files/64553507936.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9799/files/agronomy_books_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8205/5829/files/tidujapiwitedamutoko.pdf
    • https://cdn.shopify.com/s/files/1/0431/2881/5783/files/xirijuri.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16481260084.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_off0000613f.bin
fbe38fb5c2194d3b5f19dafe5e7d015fb488967f93f0db1c221abe492370a7e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x613F 5588 bytes
font_01_sfnt_off00007427.bin
bdb8de9ffe346cb8dcc9accb9d1460bb987e59df611b4f891a8629f03f6fcacb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7427 14780 bytes

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