Malicious PDF — malware analysis report

Static analysis result for SHA-256 15fe8aeb213ee0c8…

MALICIOUS

PDF

27.1 KB Created: 2020-09-16 20:59:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 43733c7832658e4b06f743575653c230 SHA-1: 5922a091c8c7016c7b16aa380a5833d6944d9c5a SHA-256: 15fe8aeb213ee0c81c9b7efbb0bd302dedd1c7f850ac88cc5d6097273d6f24f0
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document functions as a link farm, containing numerous embedded URLs that redirect to external sites. One prominent URL, 'https://ttraff.ru/wix?keyword=papa%2527s+cupcakeria+unblocked+cool+math', is flagged as a malicious redirector. The document's structure and the presence of multiple links on disposable hosting suggest an attempt to lure users to potentially harmful content, possibly for SEO manipulation or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=papa%2527s+cupcakeria+unblocked+cool+math In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4d36acb3-462c-4411-8859-ec11d71b07a6.filesusr.com/ugd/bc4951_572d26d8289e4da2bd4bddb0ff4fceda.pdf?index=trueIn PDF document text
    • https://dfadd22c-783b-4214-aeba-588ddc87e349.filesusr.com/ugd/dc8a8e_889ca2d328104f7a8f2abb4b07e34cf4.pdf?index=trueIn PDF document text
    • https://83e50bc0-e75f-421a-add0-988c2bcc27e9.filesusr.com/ugd/7d1dc9_70b17f8d270446abb182f26a0e067be2.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9932/4580/files/negodigufonug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4173/4301/files/30752381798.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/2660/0351/files/admiralty_charts.pdfIn PDF document text
    • https://061c7e15-16f9-495e-bc0b-b49eb2059823.filesusr.com/ugd/f09a9d_91d7d83052004741a4b837f4ca273d44.pdf?index=trueIn PDF document text
    • https://2643ca8e-16a3-406a-aa6b-3330a84f87ed.filesusr.com/ugd/668a47_90da91eacb124bc9a4f9b6d0200d04ba.pdf?index=trueIn PDF document text
    • https://5e0d2410-5ebf-4d81-b4fd-e56b80c1293b.filesusr.com/ugd/8bf3fc_6f9ece3f8702420abb77b044a3c2a658.pdf?index=trueIn PDF document text
    • https://4a7a99f3-8a87-496c-99e1-105ed173dd5a.filesusr.com/ugd/04c368_ca043c13e8d943088f052a553aa2e65b.pdf?index=trueIn PDF document text
    • https://4585022e-a212-44c2-af5a-f4fc7b738e3f.filesusr.com/ugd/9ff9b8_3580f43237d14361b5f183aef19ac6c8.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4122/5880/files/bordeaux_city_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/tonupi.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB1 5552 bytes
SHA-256: 32c8cc9f9c5e712dbdb6aa45da6d43bdb7db329fe4ede0d0fea7107e354f39f7

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