Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcbd78055ed7049c…

MALICIOUS

PDF

40.3 KB Created: 2020-08-30 19:44:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75286e309665e75d6b0593f92fbde90c SHA-1: 4b7dc8bb11053a3b793569aa95cd4ae343160d3f SHA-256: bcbd78055ed7049c6f49ca29ee66c4a96f044f6db71a17eeb3968afb76ca8bd4
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector link to 'ttraff.ru'. This indicates a link farm or phishing attempt designed to direct users to malicious infrastructure. The document body, though heavily obfuscated, contains the malicious URL and references to book titles, likely as a lure.

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=an+abundance+of+katherines+audiobook
    • https://cdn.shopify.com/s/files/1/0429/3384/6175/files/wonunuxenajadujikipot.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5063/files/pilepepojir.pdf
    • https://cdn.shopify.com/s/files/1/0432/3262/4808/files/defok.pdf
    • https://static.usrfiles.com/ugd/49be48_ed989291dde547d4b8a0487eb5151c51.pdf
    • https://static.usrfiles.com/ugd/b5472a_71f331dd310148959ec8b12f12a9073f.pdf
    • https://static.usrfiles.com/ugd/b8c837_6c0238f118ca4d269845d0bdfe52e7ee.pdf
    • https://static.usrfiles.com/ugd/b8c837_e9f61959076245ed9fa00c96a6d56967.pdf
    • https://static.usrfiles.com/ugd/97aff7_2d788e3fb0594b40ba86aca72e6a27d8.pdf
    • https://static.usrfiles.com/ugd/585b1d_341b20502dc94060adf968e80e3515e1.pdf
    • https://cdn.shopify.com/s/files/1/0459/9601/5773/files/vugiforulovox.pdf
    • https://cdn.shopify.com/s/files/1/0434/0583/6444/files/airy_stress_function_example.pdf
    • https://cdn.shopify.com/s/files/1/0431/5299/8556/files/63441926012.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_off00005e55.bin
5591a68dbbf3f552a71db60d0036868eb306ca6fd0ee3e74da688fc8a00ee628		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E55 5268 bytes
font_01_sfnt_off0000702e.bin
53b4568b8907a83135476b87f5893c3f2e17112aefeb3f18121eae0af905f77b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x702E 10792 bytes

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