Malicious PDF — malware analysis report

Static analysis result for SHA-256 09eb5ed3ca28e5bd…

MALICIOUS

PDF

110.4 KB Created: 2020-08-31 04:55:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e284a3dc10a431a43c52101ae406c7db SHA-1: eaa16fc67ddf0cb6e2270289430319a2dd1fc26c SHA-256: 09eb5ed3ca28e5bd05331383ed1cc43c8bd2c476de82e6934b332e721bbfd50e
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one pointing to a known malicious redirector at 'ttraff.com'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a tactic to manipulate search results or distribute malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.com/wix?keyword=panorama+biblico+ilustrado
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5509/4679/files/54573325399.pdf
    • https://cdn.shopify.com/s/files/1/0440/0149/3142/files/ncert_textbooks_class_11.pdf
    • https://cdn.shopify.com/s/files/1/0433/6582/6719/files/gapefonunejixajufa.pdf
    • https://cdn.shopify.com/s/files/1/0435/6544/9371/files/gulapidu.pdf
    • https://cdn.shopify.com/s/files/1/0459/7311/0951/files/aither_water_markets_report.pdf
    • https://cdn.shopify.com/s/files/1/0437/7716/3426/files/maximatuvazujonuzaparomo.pdf
    • https://cdn.shopify.com/s/files/1/0460/1688/8999/files/kugebuparewotejatex.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_5cc7cdfbea6044248ae0db00bcf72c8b.pdf
    • https://static.usrfiles.com/ugd/b8c837_17019950445d40e2b4290c7219e8af36.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_off00017880.bin
4e9c3a0f312c005c2016af9112a82d87c45e2b97bce8c728072d74c8785dac82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17880 5228 bytes
font_01_sfnt_off00018a21.bin
eb7bfafac58f80fc1df88952cf62300c943435c80459c62bdf017e4450213c97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18A21 10240 bytes

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