Malicious PDF — malware analysis report

Static analysis result for SHA-256 bca3c4fa53a0b596…

MALICIOUS

PDF

43.6 KB Created: 2020-09-09 21:57:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 12ed8bd1b3d6271e801364d74a7cd3fa SHA-1: 2cd7b2d8cefa101e0c6114651545443bf6f58d40 SHA-256: bca3c4fa53a0b596ff9041e3e145bc177df4b396332caa3068f9cf30b839f6b8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, with a critical heuristic firing indicating it redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/wix?keyword=template+for+bottle+label+design, which is flagged as a malicious redirector. This suggests the document is part of a phishing campaign designed to redirect users to 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/wix?keyword=template+for+bottle+label+design In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/5af86b_c116898e514a48758282e5297667a7e3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9904c2_9b8a5118967b40218e50ae93d8ae3031.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_63fa5c06e79e4155b579388d06b9f5f7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b2ba6b_0dd4bca0370a44b483e61012dda0c143.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_094417feb9f5406e903493728ffa6467.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a298ce_874b5d6581ba404c8d15d4d812f6f77e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/26f730_b6a24bae8ce2402fb33bbc6492c0d0b0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/07e02c_6bf66a2a822a4f98a2c819ecd4687aca.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/2556/4583/files/56484990476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6761/2065/files/adobe_services_sign_in.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4446/9927/files/cadena_alimenticia_terrestre.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/6061/0460/files/jigaju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9681/0396/files/45334719316.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E60 5452 bytes
SHA-256: 5a960470cb3d0232c76a0eb842bb34809f3c83639d5864c8ca5a58b918014bed
font_01_sfnt_off000070c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70C5 15800 bytes
SHA-256: 50b58e0d90616b404e0536e327dbd2d6c1cd99026d3f0f56ce7fb81640cffe1c

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