Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cf3ff96be064d08…

MALICIOUS

PDF

62.5 KB Created: 2020-08-30 11:46:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31ec9846a84095756a0b4f9db5512385 SHA-1: 2781061e2122b4cc541d4f49008636ea1a66ba5f SHA-256: 5cf3ff96be064d08d15be1be12f642f4d78a9bfcc3b9f14eae7018eaa15682a3
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector URL (https://ttraff.ru/wix?keyword=pact+of+the+undying). The document body, though heavily obfuscated, contains this URL and appears to be a lure, possibly related to academic or legal documents given the shopify links. The ML classifier strongly indicates maliciousness, and the presence of a redirector suggests an attempt to lead the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wix?keyword=pact+of+the+undying
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/4672/2974/files/arjuna_award_list_2020.pdf
    • https://cdn.shopify.com/s/files/1/0445/3544/7711/files/disavowals_or_cancelled_confessions.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/82558998055.pdf
    • https://cdn.shopify.com/s/files/1/0431/6246/8514/files/23538019628.pdf
    • https://cdn.shopify.com/s/files/1/0437/8374/9781/files/67141155898.pdf
    • https://cdn.shopify.com/s/files/1/0428/6195/3191/files/correct_plural_form_of_appendix.pdf
    • https://cdn.shopify.com/s/files/1/0464/9982/3784/files/the_qb_bad_boy_and_me.pdf
    • https://static.usrfiles.com/ugd/b8c837_06205787d8f742418bc3961336617df3.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_ada6460ff2c4439591acfd443403ba0d.pdf
    • https://static.usrfiles.com/ugd/b8c837_013f90c0e14d4036972e4cb464f4fd5b.pdf
    • https://static.usrfiles.com/ugd/c12414_aa3c2b0548a2432ca58851a85de983f7.pdf
    • https://static.usrfiles.com/ugd/b8c837_00a9562b2044405db30aef232bb75b87.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aa6e.bin
b86e70d8f0e375bb4f48cf7989f409d2b3f187bad716631b44ef67e8434b6d5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA6E 4964 bytes
font_01_sfnt_off0000bb4c.bin
5bd958565b7a86e44edd1485bf91cb9ca421ff978734c8267aee4b54585e9d99		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB4C 10504 bytes
font_02_sfnt_off0000defa.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFA 4324 bytes

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