Malicious PDF — malware analysis report

Static analysis result for SHA-256 1818792c28f78175…

MALICIOUS

PDF

43.2 KB Created: 2020-08-17 11:42:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94c95f8f885a52ec3d7563d6f72918e3 SHA-1: 2189dc03797333a1bb60ffd14016524d9dc8337d SHA-256: 1818792c28f78175fba02403ddba3522f291ba3ad118dddc37ccc7984acaa155
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 hosted on various domains. One of these links, 'https://ttraff.ru/pify?keyword=canned+beans+nutritional+information', is flagged as a malicious redirector. This suggests the document is part of a link farm or SEO manipulation scheme designed to drive traffic to potentially malicious sites.

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=canned+beans+nutritional+information
    • http://puketuko.alisonjerrydesigns.com/uploads/1/3/1/4/131406082/4109977.pdf
    • http://files.theaceso.com/uploads/1/3/0/8/130814208/3017576.pdf
    • http://files.marcytcm.com/uploads/1/3/2/8/132814136/77512f456be13.pdf
    • http://files.andiamo-ranger29.com/uploads/1/3/1/8/131871586/mubutofer-wekela-zupozeluvara-damopoxonuledu.pdf
    • http://files.essenceofblissmassage.com/uploads/1/3/0/7/130739268/razurapiriro-wirakixawil.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6616/2341/files/j_dilla_donuts_zip.pdf
    • https://cdn.shopify.com/s/files/1/0438/9522/6523/files/palm_trio_650.pdf
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/harpoon_operation_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/62862628871.pdf
    • https://cdn.shopify.com/s/files/1/0432/1555/2672/files/yookoso_an_invitation_to_contemporary_japanese_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/2799/5552/files/bozado.pdf
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/68449634451.pdf
    • https://cdn.shopify.com/s/files/1/0432/0985/1048/files/94838489111.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/dugodo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9930/7673/files/pexupelizarobewo.pdf
    • https://cdn.shopify.com/s/files/1/0440/9442/3192/files/free_simple_budget_template_word.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c2a.bin
a1ca69b70416210ec73145ea66311beacf3a0a67c54f2400884256e83381a596		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C2A 5096 bytes
font_01_sfnt_off00007d62.bin
ed018940628a9f47cde9fd1a9717fe99ce4f169a93c13467fb02619062623c5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D62 10068 bytes

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