Malicious PDF — malware analysis report

Static analysis result for SHA-256 14228477848891a5…

MALICIOUS

PDF

67.2 KB Created: 2020-08-11 00:41:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7c9e1dd92d74741f9a20cf6ab220afe SHA-1: d6baf4843f1e85a35134864aee27ce18ce52d0cb SHA-256: 14228477848891a5e5654ff2ce08983ca8f3c5f7d5b465e8b8d971592e244b68
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL and references to other PDF files, suggesting a link farm or SEO poisoning attempt. No scripts were extracted, but the presence of embedded URLs and the redirector link are strong indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=beyond+the+quartic+equation+pdf
    • http://files.eastviewhshockey.com/uploads/1/3/0/7/130740123/9913df9157f890e.pdf
    • http://mudal.kaileewallis.com/uploads/1/3/0/8/130813108/vunonijoka.pdf
    • http://files.mikeaguilera.com/uploads/1/3/2/6/132680922/32d6c.pdf
    • http://files.trinitywinchestertn.org/uploads/1/3/0/9/130969385/3882519.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4678/0566/files/23489867889.pdf
    • https://cdn.shopify.com/s/files/1/0432/0120/0289/files/81380469263.pdf
    • https://cdn.shopify.com/s/files/1/0433/0956/4068/files/degree_works_uga.pdf
    • https://cdn.shopify.com/s/files/1/0432/6424/5922/files/lozetimowisarutu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1324/9946/files/concat_dataframe_pandas.pdf
    • https://cdn.shopify.com/s/files/1/0446/6094/9155/files/alone_partitura_piano.pdf
    • https://cdn.shopify.com/s/files/1/0431/1446/3394/files/lazozekerofadefavasajixi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0273/2448/files/iowa_courts_online_payment.pdf
    • https://cdn.shopify.com/s/files/1/0432/7879/4920/files/blood_type_a_negative_diet_food_list.pdf
    • https://cdn.shopify.com/s/files/1/0427/9900/5863/files/neumonia_viral_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0434/3840/7845/files/disaster_risk_management_books.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a712.bin
f9b9d59cb49ee3b94f6a62945c8f125a081af189493a28bd88b17ef07432c0a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA712 5308 bytes
font_01_sfnt_off0000b91d.bin
2a55a3c0a9e7ab0a203463ea089a55bdf3d7da7a8deabacce345aa05d42f317b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB91D 15752 bytes
font_02_sfnt_off0000ea31.bin
f700a1e17cad3aa9751b7d573a027cc47a1234c41c4504e1e89ce8d1bab16a91		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA31 16184 bytes

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