Malicious PDF — malware analysis report

Static analysis result for SHA-256 94677a8e065e4373…

MALICIOUS

PDF

44.0 KB Created: 2020-08-09 18:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35e42f361bd49085fde5683b4bb674c4 SHA-1: ffab66d521bc2d477a976df05b093e60a12dd63d SHA-256: 94677a8e065e437396f3e2f405d3b249067e12f7d777e2407a526fac4a89f9c3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm pointing to numerous PDF files hosted on various domains, including a critical redirector to ttraff.ru. The document body itself contains the malicious URL, suggesting a lure to trick users into clicking it. The ML classifier strongly indicated maliciousness, and the presence of multiple embedded URLs supports a delivery mechanism for malicious content.

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=mapa+turistico+barcelona+2020+pdf
    • http://files.texascountryweddings.com/uploads/1/3/0/9/130969525/sosoju-zemefoxo.pdf
    • http://files.joeypedersonracing.com/uploads/1/3/0/7/130740391/dipuf.pdf
    • http://xewejiju.hartfordcathedral.org/uploads/1/3/0/8/130813528/c2f366d9543938.pdf
    • http://files.philipsmotoringschool.com/uploads/1/3/1/1/131163634/466939.pdf
    • https://cdn.shopify.com/s/files/1/0434/4247/1064/files/elasticsearch_put_mapping.pdf
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/rinexowaroregitidedojan.pdf
    • https://cdn.shopify.com/s/files/1/0434/2025/4375/files/34065307745.pdf
    • https://cdn.shopify.com/s/files/1/0437/1575/6182/files/viwuzukebo.pdf
    • https://cdn.shopify.com/s/files/1/0436/1093/1358/files/kebivukotot.pdf
    • https://cdn.shopify.com/s/files/1/0432/6581/8789/files/fixajeduzutosejoxan.pdf
    • https://cdn.shopify.com/s/files/1/0440/3032/8997/files/pozifaserakujetum.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3067/files/fisusezawopagupeperi.pdf
    • https://cdn.shopify.com/s/files/1/0434/9083/6645/files/32493222992.pdf
    • https://cdn.shopify.com/s/files/1/0432/9478/5704/files/drugs_used_in_the_treatment_of_tuberculosis.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_off00006c8d.bin
f93376cd750370886629c5495c5ee1d97a236d383339b61fb86d8c42d00a8e92
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8D 5568 bytes
font_01_sfnt_off00007f8f.bin
ce8489b22e66ba3fe1ca7e2a3bf15ad43ebc76616250c1c8f0b1e7fd812ed28a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F8F 10592 bytes