Malicious PDF — malware analysis report

Static analysis result for SHA-256 88785e46ce2ee80f…

MALICIOUS

PDF

39.6 KB Created: 2020-08-10 10:00:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d170d7495748521f38a5de745b2c0ca SHA-1: a247ce32863128e51171dc889c747160af3ca873 SHA-256: 88785e46ce2ee80f63f8f6e7e488d4f92f625dd2b33b480a542d4230ff39ddaf
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, characteristic of a link farm. One of these links, https://ttraff.ru/pify?keyword=aprender+latim+livro+pdf, is identified as a malicious redirector. The document's purpose appears to be to lure users into clicking these links, potentially leading them to malicious content or phishing sites. No scripts were extracted, and the document body was heavily obfuscated.

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=aprender+latim+livro+pdf
    • http://vevodi.obob.me/uploads/1/3/0/7/130776485/6433370.pdf
    • http://files.hohnesroadplayhouse.com/uploads/1/3/2/6/132683165/varuxoregafawoko.pdf
    • http://files.2as.ency-education.com/uploads/1/3/0/7/130775309/cee3c1a153bf894.pdf
    • http://files.austinhighseniors.com/uploads/1/3/0/9/130969656/a1f4bcbd6.pdf
    • https://cdn.shopify.com/s/files/1/0427/8855/2870/files/ethiopian_grade_11_english_textbook_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65294746239.pdf
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/ford_focus_haynes_manual_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/3778/6266/files/fimikagimemewe.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/geometrical_tolerances_symbols.pdf
    • https://cdn.shopify.com/s/files/1/0438/8811/5867/files/rutidatida.pdf
    • https://cdn.shopify.com/s/files/1/0428/2476/1510/files/manual_capture_one_12_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0437/9725/0210/files/tupat.pdf
    • https://cdn.shopify.com/s/files/1/0431/0351/8882/files/samowetomivanajizotufudop.pdf
    • https://cdn.shopify.com/s/files/1/0431/5827/4205/files/28223380661.pdf
    • https://cdn.shopify.com/s/files/1/0437/4816/3735/files/nuwalisesevuzuwibefulopa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/ralegamu.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_off000058b3.bin
2e81d08d7ef31cdd77d34ea8ee20d6a552c9938089e0cbd1653ebf29aedb522f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58B3 5060 bytes
font_01_sfnt_off000069df.bin
cc6a477721ced076db7648bc3f4d3a25d85dea097a70ee92642572163ae24f14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69DF 12840 bytes

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