Malicious PDF — malware analysis report

Static analysis result for SHA-256 f34a6bd284918327…

MALICIOUS

PDF

40.1 KB Created: 2020-09-05 23:02:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f6e9cfa1e1aca2c8beef7369de026e6f SHA-1: b853e1d4c60f0e67bb9b2165bef62daa3cfe7d10 SHA-256: f34a6bd284918327687b1b6ae3469d07800f62f73de4429ebebc151d74e196e1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a link farm and a redirector to malicious infrastructure, disguised as a fishing report. The ML classifier strongly indicates maliciousness. The embedded URLs, including the primary redirector at https://ttraff.ru/wix?keyword=laurel+lake+ky+fishing+report+2018, are designed to lead users to harmful content. No scripts were extracted, but the PDF structure itself is used for malicious redirection.

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=laurel+lake+ky+fishing+report+2018 In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6574/5314/files/minecraft_smp_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6428/5601/files/xezegotakifabumun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3687/6695/files/sujanamova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3458/1911/files/56331598672.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/405339_02d3e3b70aa543fe84a2660a821e4c8d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c8a981_7808de58faac4d8ea45dfe823b841b24.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f7fbc8_4d2bb9db04e94dda84797421bee3b0c3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_56b804a908ab43a5a2669e288ce001d1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/02ccf7_a44f9c1cbde94eb08b489007ddd09ff6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/227d0f_83122cd6b79c4569b04eb86a4a3ad6f6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f1780b_53fe4040706340d1aec56c03297ba720.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/24853a_b80f43ab742b4b9f83f30e3248df0132.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_b3d1e5b9c4dc424298829ba826c98630.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_off00005446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5446 5792 bytes
SHA-256: 22551a9fa3208833e71592936e16b78dc7fbaa76f29c4127a504d19c8206b3e7
font_01_sfnt_off00006812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6812 14020 bytes
SHA-256: 423416d830573982e2ef423ac27aaf4ece2726a3249787e6407074b92ccaccd2

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