Malicious PDF — malware analysis report

Static analysis result for SHA-256 642a3fc69763e4d3…

MALICIOUS

PDF

43.5 KB Created: 2020-08-17 14:17:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0e5ae99b5ae0946ccb6ce16e8e60479 SHA-1: 9905aa6e1b885bfb59facb4b1105119b07655b33 SHA-256: 642a3fc69763e4d34fd735237424845f6f8a927a18538eb189c7c5823f526650
94 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK, pointing to 'https://ttraff.ru/pify?keyword=christmas+carol+lyrics+book+pdf'. This indicates an attempt to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient to infer a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/pify?keyword=christmas+carol+lyrics+book+pdf
    • http://revivepe.kcneev.com/uploads/1/3/0/8/130814328/4558934.pdf
    • http://bubowa.pandeliascanaryyellowcompany.com/uploads/1/3/1/4/131437774/f25daf60162f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31052941417.pdf
    • https://cdn.shopify.com/s/files/1/0430/0436/2906/files/3670205935.pdf
    • https://cdn.shopify.com/s/files/1/0435/1872/2216/files/55997788005.pdf
    • https://cdn.shopify.com/s/files/1/0431/3602/4742/files/tuseritanabupesomis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/73121007565.pdf
    • https://cdn.shopify.com/s/files/1/0436/9462/0837/files/circumcision_benefits.pdf
    • https://cdn.shopify.com/s/files/1/0436/9691/4587/files/cambridge_grade_6_science_past_papers.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_off00006c86.bin
3cf37f2ec249c788b5acc32721b501d9655ac057142e7a79cd8c3f2a4f031462		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C86 5608 bytes
font_01_sfnt_off00007f6e.bin
bac95647ea151738340b91679194fb2e79523a96d5da6d823cdea9518333e50c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6E 9980 bytes

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