Malicious PDF — malware analysis report

Static analysis result for SHA-256 84047faa95ed32e6…

MALICIOUS

PDF

34.1 KB Created: 2020-08-07 22:11:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6403c7a77d807461579d0385a6fdb882 SHA-1: b1eb52e7c4e59067fdf0b27ea3ca96a9c7a3231f SHA-256: 84047faa95ed32e6078d025f807af154bf897810402ae0919ed9870b582fd966
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links, many of which point to a link farm designed to redirect users to external content. The primary malicious link, 'https://ttraff.cc/pify?keyword=preparacion+de+alcohol+en+gel+pdf', is identified as a known malicious redirector. The document's structure and the presence of many Shopify-hosted PDF links suggest an attempt to manipulate search engine results or distribute malicious content through a large number of seemingly benign documents.

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.cc/pify?keyword=preparacion+de+alcohol+en+gel+pdf
    • http://files.denglenntraveljunkies.com/uploads/1/3/1/3/131398555/73c5871f.pdf
    • http://files.stroproductionz.com/uploads/1/3/1/1/131163898/d27c665.pdf
    • http://files.ncgconsultants.com/uploads/1/3/0/9/130969573/gowibug-kumeb-sedusalidu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/pabetafetotilab.pdf
    • https://cdn.shopify.com/s/files/1/0429/1877/2903/files/wofadedubopa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0364/2007/files/xoxozitixerotani.pdf
    • https://cdn.shopify.com/s/files/1/0438/5944/3862/files/75353778367.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/savowogofoxifonikili.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/86364522707.pdf
    • https://cdn.shopify.com/s/files/1/0438/9090/1144/files/34137635982.pdf
    • https://cdn.shopify.com/s/files/1/0431/9857/8848/files/susaxosulox.pdf
    • https://cdn.shopify.com/s/files/1/0435/7275/6648/files/accounting_tutorial_download.pdf
    • https://cdn.shopify.com/s/files/1/0446/9984/4762/files/bser_10th_social_science_book.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_off000046ef.bin
cde10911620f98f2f65989c989e427aac1b0d4aa19d9899c6e5e5c2c925d0101
pdf-font-stream PDF embedded font (sfnt) at offset 0x46EF 5240 bytes
font_01_sfnt_off000058bd.bin
7de36156d243d8a4c3e22d1ed117a989e2c31620aa6de99fd45d36715c1c3999
pdf-font-stream PDF embedded font (sfnt) at offset 0x58BD 10336 bytes