Malicious PDF — malware analysis report

Static analysis result for SHA-256 736ef9bb02af8147…

MALICIOUS

PDF

36.2 KB Created: 2020-08-22 18:08:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01091a5cf3f95733559fb2f48c1c1193 SHA-1: 04f7052b56fa5ae3d61c88bd19e2a2aef899a7e0 SHA-256: 736ef9bb02af8147c99647cb441648e10b67fe99d9bbfb4dd11de2ce2806b8db
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the overall malicious classification suggest a phishing or redirection attempt.

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.cc/pify?keyword=va+10+point+preference+form
    • http://xifebi.mindspringhempco.com/uploads/1/3/1/0/131070858/b69b0a202.pdf
    • http://files.vladimirblagoev.com/uploads/1/3/1/8/131856195/2574461.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1871/4264/files/o_mio_babbino_caro_scribd.pdf
    • https://cdn.shopify.com/s/files/1/0438/4433/7824/files/shandaar_1990_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0428/7833/7187/files/9481080169.pdf
    • https://cdn.shopify.com/s/files/1/0438/3762/0381/files/absceso_apical.pdf
    • https://cdn.shopify.com/s/files/1/0439/1282/2952/files/39688603417.pdf
    • https://cdn.shopify.com/s/files/1/0435/4179/0871/files/aprender_a_leer_el_tarot_de_marsella.pdf
    • https://cdn.shopify.com/s/files/1/0438/4836/8288/files/10_commandments_explained.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_off00005181.bin
bf4d039961c7305b3abdf3b70df22a5a8096417045eb79e6d71c6ffb9313f128		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5181 5112 bytes
font_01_sfnt_off000062d0.bin
910ad223b778c3e290415f57eb9d54ba7694a8a8dacb6af23ff23cfd1d040067		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62D0 9848 bytes

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