Malicious PDF — malware analysis report

Static analysis result for SHA-256 6060d83d333c54cd…

MALICIOUS

PDF

49.2 KB Created: 2020-08-11 18:40:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc6e4860e419e0367e91dd35befa9ad2 SHA-1: 22cc136eb5400c26067917b359023c2ca604ccda SHA-256: 6060d83d333c54cdab0c7b748af995fdda722e6306c28f5dd8cbb5a3fbd5d9eb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One of the primary links directs to a known malicious redirector infrastructure, indicating a malicious intent to lead users to harmful content. The ML classifier also strongly flagged this PDF as malicious.

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=metabolismo+de+nucle%25C3%25B3tidos+purina+y+pirimidina+pdf
    • http://files.waveloopart.com/uploads/1/3/2/7/132740343/883d0.pdf
    • http://files.easternshorechess.com/uploads/1/3/1/4/131438819/jenofafevu.pdf
    • http://files.globalwarmingcompany.com/uploads/1/3/1/4/131407274/milavow-kadodu-rumanatuxo.pdf
    • http://files.ruleof5.com/uploads/1/3/1/6/131606046/pokowo-lokatojupipewor-giwekuw.pdf
    • http://files.allamericancargo.com/uploads/1/3/0/8/130814017/4c0a521491f304.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2436/7266/files/domixakoxuwezufevugix.pdf
    • https://cdn.shopify.com/s/files/1/0432/5585/7315/files/71901652204.pdf
    • https://cdn.shopify.com/s/files/1/0432/7797/5717/files/xaxetobitemekovirumag.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/files/pitobipawevagirimoxeja.pdf
    • https://cdn.shopify.com/s/files/1/0440/1404/3294/files/algorithm_design_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0432/2823/3887/files/lowafowenejes.pdf
    • https://cdn.shopify.com/s/files/1/0432/7034/0772/files/vedivavijefovoluboxudita.pdf
    • https://cdn.shopify.com/s/files/1/0430/4060/4314/files/bowunasel.pdf
    • https://cdn.shopify.com/s/files/1/0439/1282/2939/files/dea_form_222.pdf
    • https://cdn.shopify.com/s/files/1/0432/8656/0936/files/bharathiar_university_m._com_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/26997407231.pdf
    • https://cdn.shopify.com/s/files/1/0427/7560/9510/files/25857264935.pdf
    • https://cdn.shopify.com/s/files/1/0431/4434/7799/files/zinuvodobutukipe.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_off000068a1.bin
99696097f223783c3165876dfe8ea7a109d479d3379f09e79455c8d67d0f829e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68A1 5684 bytes
font_01_sfnt_off00007ba8.bin
d0ba107fdfcc0f0f66b2541d28b72c10a952c7c655d2033b5987cde2550c6f04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA8 11108 bytes
font_02_sfnt_off0000a003.bin
d7c0313d84b709fe8a6a90baca56b34c20eeda1db47cffc02c31991c89a68c0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA003 16080 bytes

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