Malicious PDF — malware analysis report

Static analysis result for SHA-256 db655d7789689a58…

MALICIOUS

PDF

47.7 KB Created: 2020-07-29 16:56:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5237231a8e01265642f0f5467e4da91b SHA-1: a8738b6d94139f340bb079c217fc078cea0ec484 SHA-256: db655d7789689a582a4436d88bb086133a49b30c0728a0c57c95489f211da7ff
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing for a PDF link farm. One of the primary links points to a known malicious redirector, ttraff.ru. The document body is heavily obfuscated, but the presence of numerous external links suggests a delivery mechanism for malicious content or phishing attempts.

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=crisis+addisoniana+pdf
    • http://files.teensofhonor.com/uploads/1/3/1/6/131636678/3843729.pdf
    • http://files.tecolerelief.com/uploads/1/3/1/6/131637402/c5abb20.pdf
    • http://files.madamedrydensgrade5class.com/uploads/1/3/2/7/132710797/monomiwisap-ravub-zosagezubepako-jurimowekol.pdf
    • https://cdn.shopify.com/s/files/1/0433/6658/0382/files/zogoxapivi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9819/3566/files/mifemidironixone.pdf
    • https://cdn.shopify.com/s/files/1/0430/4715/7914/files/xudirebuvabo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9255/7462/files/zewubajibiruper.pdf
    • https://cdn.shopify.com/s/files/1/0437/7808/0919/files/75402634663.pdf
    • https://cdn.shopify.com/s/files/1/0433/9505/5777/files/51772287587.pdf
    • https://cdn.shopify.com/s/files/1/0435/7118/3777/files/xopopanafuworo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/tokagajofigemoridedurit.pdf
    • https://cdn.shopify.com/s/files/1/0430/6577/0135/files/digumozadizowuxiwetapi.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/44499651673.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/84067272494.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_off00007db3.bin
dfb382744b08f64ea170c5af28509c8b0fedc624ea2e77737004339928fd848f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB3 4616 bytes
font_01_sfnt_off00008d5a.bin
65627754a269948a12816fe1b04c0a094a56a7277a54f576bce4d3911b9cf6af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D5A 10728 bytes

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