Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1b9a80ef5da496c…

MALICIOUS

PDF

41.9 KB Created: 2020-08-07 23:26:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 963733394700cc902877fdce9493d60b SHA-1: 510fcf3254e9b31aedefe85f6a2cb77dedcf307d SHA-256: e1b9a80ef5da496caaae787254adce125739dc8678904b08ff2d6f560590baa7
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-Override T1059.001 PowerShell

The PDF file contains a large number of embedded links, characteristic of a link farm designed to manipulate search engine results or redirect users to malicious sites. One of the primary URLs, https://ttraff.ru/pify?keyword=middle+cerebral+artery+syndrome+pdf, is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on Shopify, suggesting a coordinated effort to distribute malicious content. No scripts were extracted, but the PDF structure itself is the delivery mechanism.

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=middle+cerebral+artery+syndrome+pdf
    • http://files.mgeducation.net/uploads/1/3/1/4/131406391/dorit.pdf
    • http://files.brooklindanceacademy.com/uploads/1/3/1/8/131871994/ad8f29e6.pdf
    • http://rovupu.andrekoen.com/uploads/1/3/2/3/132303382/bitawinevajutojaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gidawibozifuniji.pdf
    • https://cdn.shopify.com/s/files/1/0429/5501/4298/files/sujisuxepizejoke.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lafiku.pdf
    • https://cdn.shopify.com/s/files/1/0432/6863/6834/files/56737423135.pdf
    • https://cdn.shopify.com/s/files/1/0438/7468/0987/files/kuvojoxoguxisuroluxazo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/rorenajufoto.pdf
    • https://cdn.shopify.com/s/files/1/0433/8185/0268/files/python_csv_dictreader.pdf
    • https://cdn.shopify.com/s/files/1/0439/1947/4856/files/kazuo_inamori_libros.pdf
    • https://cdn.shopify.com/s/files/1/0429/5966/7363/files/right_brain_phonics_reading_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/3759/6575/files/eclipse_car_2015.pdf
    • https://cdn.shopify.com/s/files/1/0434/3765/4178/files/watermark_files_download.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_off00006690.bin
f56d7fd0f279653fa3bf4d35e05a8a7d558d42f1a393faecb7bc1eb21371f048		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6690 5548 bytes
font_01_sfnt_off00007963.bin
2f001c514e75818bb413b7a7605df57ddcb0a0c7e1e294fda9aa7c08201c4703		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7963 9752 bytes

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