Malicious PDF — malware analysis report

Static analysis result for SHA-256 bde7bacd4839d323…

MALICIOUS

PDF

41.3 KB Created: 2020-09-01 01:51:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcca0372760764ed89d2f767e4957c59 SHA-1: 71576182e1281c5beccf69a32546607040c8c60b SHA-256: bde7bacd4839d323c023301303bf69ee4a128af9954e04880f6463d88a7b0488
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that suggests it is a template, and the primary malicious URL is clearly visible. This indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=fashionary+mens+template
    • https://cdn.shopify.com/s/files/1/0435/4569/0266/files/ielts_10_test_1_writing_task_1_model.pdf
    • https://cdn.shopify.com/s/files/1/0436/5765/8521/files/history_of_islam_in_subcontinent.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6152/files/jurosonerakaji.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d995f8dd9fc4b71bd66e35351a8146f.pdf
    • https://static.usrfiles.com/ugd/b85eb0_5073ea8763a542d699f97ed24808c42d.pdf
    • https://static.usrfiles.com/ugd/345929_03881932d8434896bffb6e957c2797b4.pdf
    • https://static.usrfiles.com/ugd/7c30af_7fe4bec29af44178b9aa60585fc39a77.pdf
    • https://static.usrfiles.com/ugd/824332_bc5d5ab358af4fae833ed0eb23c7a301.pdf
    • https://static.usrfiles.com/ugd/1f5cef_d68c9def55da440796213af3b24c2108.pdf
    • https://static.usrfiles.com/ugd/b972d5_a15f12afbada469baf5b34461172eeab.pdf
    • https://static.usrfiles.com/ugd/f8de3e_4fe6dc87644946a8a7b5fd8189d4ebc6.pdf
    • https://cdn.shopify.com/s/files/1/0432/8049/8841/files/47448150124.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0741/files/84567201161.pdf
    • https://cdn.shopify.com/s/files/1/0465/4596/1118/files/converting_linear_equations_worksheet_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/67697025262.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_off000063d1.bin
74bd19b5a429225082642ce6c57ed40f955db411dabac9d6175424491c23517d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63D1 5116 bytes
font_01_sfnt_off00007518.bin
79a8d6269e7ab959602954d1b47ad4bef471539669af7cd8a30cc9721f160370		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7518 10356 bytes

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