Malicious PDF — malware analysis report

Static analysis result for SHA-256 970396d837d210f9…

MALICIOUS

PDF

47.3 KB Created: 2020-08-12 16:40:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff2cd3b0aa131eb455a17c23797b42eb SHA-1: c22dddb1b77a25c264fb2e4a51e68cfb40a27f57 SHA-256: 970396d837d210f962de34b6cae1fd8667b68b45058a3ecf9cb11a128c0e6669
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. Crucially, one embedded link redirects to a known malicious URL, `https://ttraff.cc/pify?keyword=valores+normales+de+antigeno+prostatico+pdf`, indicating a phishing or malware distribution attempt. The document body itself is heavily obfuscated but contains references to the redirector URL and other PDF links.

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=valores+normales+de+antigeno+prostatico+pdf
    • http://files.devingraysoncentral.com/uploads/1/3/1/3/131384400/4390922.pdf
    • http://files.baltzelllodge.com/uploads/1/3/2/6/132681479/3946295.pdf
    • http://files.cherisewolas.com/uploads/1/3/1/3/131382595/polutu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5058/1662/files/pensum_medicina_uasd_plan_14.pdf
    • https://cdn.shopify.com/s/files/1/0440/8547/7541/files/39982163221.pdf
    • https://cdn.shopify.com/s/files/1/0432/0365/7887/files/mcpe_master_ios.pdf
    • https://cdn.shopify.com/s/files/1/0428/6690/1148/files/96045653798.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/marathi_comedy_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/3981/7890/files/104889202.pdf
    • https://cdn.shopify.com/s/files/1/0429/3879/4147/files/how_to_refund_gifts_on_steam.pdf
    • https://cdn.shopify.com/s/files/1/0437/4121/6919/files/99693576442.pdf
    • https://cdn.shopify.com/s/files/1/0428/0388/8287/files/lularoe_build_login.pdf
    • https://cdn.shopify.com/s/files/1/0440/6670/1477/files/binary_text_converter.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_off0000752d.bin
61f8d37d36f5ea071c2b817237f8fa983d9cfd89401936b29d5281c0b316c986		 pdf-font-stream PDF embedded font (sfnt) at offset 0x752D 5440 bytes
font_01_sfnt_off0000879f.bin
7e7058a9a5fa30f64fd699a251e905fa0ff9e75d1bd57545e5fdcab43b4b19f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x879F 12256 bytes

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