Malicious PDF — malware analysis report

Static analysis result for SHA-256 67975b3b7ea0d901…

MALICIOUS

PDF

36.2 KB Created: 2020-08-31 03:05:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85573456a59eb4e85def2eec5fb3995c SHA-1: a27ef846208b7d13aae868f66f1a9fa86b57a38f SHA-256: 67975b3b7ea0d9018198d7c0132db2696afe1c5b40a2ce1bae51a54eb472d946
154 Risk Score

Malware Insights

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

The PDF contains a link farm with multiple embedded URLs, including a critical redirector link to 'https://ttraff.cc/wix?keyword=sspi+handshake+failed'. The ML classifier also strongly indicated maliciousness. The document body and embedded link annotations suggest an attempt to direct the user to malicious infrastructure, likely for further exploitation or phishing.

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/wix?keyword=sspi+handshake+failed
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5788/8936/files/reading_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/vikasuvejomexa.pdf
    • https://cdn.shopify.com/s/files/1/0463/6278/7995/files/fotamugobupusulij.pdf
    • https://static.usrfiles.com/ugd/078c79_68a191fb619249bca853d5398ba43364.pdf
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/timagamivubomakugotaga.pdf
    • https://cdn.shopify.com/s/files/1/0435/7367/4142/files/potaduli.pdf
    • https://cdn.shopify.com/s/files/1/0435/0722/0635/files/vanaboluzifaruxater.pdf
    • https://cdn.shopify.com/s/files/1/0437/0222/3013/files/lumamepunewujapojuge.pdf
    • https://cdn.shopify.com/s/files/1/0435/5027/7783/files/23502277809.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3680/files/logitech_momo_racing_wheel.pdf
    • https://cdn.shopify.com/s/files/1/0433/9279/4773/files/advanced_mathematical_concepts_precalculus_with_applications_online_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_off00004ee4.bin
35084511a1054be52fd1a7fbb3a3a117b3b65677a07df75536081403781abb01
pdf-font-stream PDF embedded font (sfnt) at offset 0x4EE4 5200 bytes
font_01_sfnt_off00006087.bin
91cc1490a48dbf95e1a0189e0618548d6eb04f7d24c6167f16be48305026d221
pdf-font-stream PDF embedded font (sfnt) at offset 0x6087 11020 bytes