Malicious PDF — malware analysis report

Static analysis result for SHA-256 34dfc3cca0aa3c4c…

MALICIOUS

PDF

42.7 KB Created: 2020-08-04 11:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 540ee5082cb35c20372956846105ddac SHA-1: 4de6a71625a9625d677c9c0a1831015745714794 SHA-256: 34dfc3cca0aa3c4c319d4591d2e9ca211f7c00338f69622c952d07f8844d42f2
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, many of which are designed to appear as legitimate PDF files hosted on various platforms. However, the primary link identified redirects to a known malicious domain, ttraff.com, indicating a phishing or redirection attempt. The document body itself contains obfuscated text and metadata suggesting it was generated by wkhtmltopdf, likely to mask its malicious intent.

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/wb?keyword=stolen%20kelley%20armstrong%20pdf%20ita
    • http://files.bearvalleyanimalhospital.com/uploads/1/3/2/6/132682731/nudoti-lafej-jazijupumupusew-pabakidekutul.pdf
    • http://rukon.ror-n.org/uploads/1/3/1/4/131437792/xupeg_zujobuxikij.pdf
    • http://files.uucfgoodnews.org/uploads/1/3/2/7/132741397/2295832.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7290/files/gejubi.pdf
    • https://cdn.shopify.com/s/files/1/0428/6929/3215/files/66228254903.pdf
    • https://cdn.shopify.com/s/files/1/0428/3059/4204/files/37109904985.pdf
    • https://cdn.shopify.com/s/files/1/0431/8524/2269/files/radudusasikiru.pdf
    • https://cdn.shopify.com/s/files/1/0434/6534/3126/files/41223992904.pdf
    • https://cdn.shopify.com/s/files/1/0428/2620/3302/files/porenulav.pdf
    • https://cdn.shopify.com/s/files/1/0431/8950/2111/files/13220730859.pdf
    • https://cdn.shopify.com/s/files/1/0430/3152/7577/files/poneli.pdf
    • https://cdn.shopify.com/s/files/1/0440/9422/6584/files/wajose.pdf
    • https://cdn.shopify.com/s/files/1/0430/8349/7623/files/31356640196.pdf
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/zevobowowesibos.pdf
    • https://cdn.shopify.com/s/files/1/0435/5804/3807/files/livingwell_pressure_cooker.pdf
    • https://cdn.shopify.com/s/files/1/0437/3010/8577/files/roxekikewagimozufuf.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_off000067bf.bin
ef16808cf07daa111a051793023bdc4ace86dc1ec553ae21e5a7b2b3cdd9efd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67BF 5628 bytes
font_01_sfnt_off00007adc.bin
416bc6945489fea15434fcfd9c19931ac4c71181780caae46c74a263d6532675		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ADC 10320 bytes

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