Malicious PDF — malware analysis report

Static analysis result for SHA-256 138f6ea791092aec…

MALICIOUS

PDF

39.5 KB Created: 2020-08-29 17:32:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95e0126bcd214dc0d8be6d866b48d0e4 SHA-1: ce4712b7ed6ab83f44fadf7eb05066d12311b4ab SHA-256: 138f6ea791092aecd4563a81d324390334a9f25f260ed32735e0befec4e43a37
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to external PDF files. One of the primary links, https://ttraff.cc/wix?keyword=indice+de+sensibilit%25C3%25A9+a+la+marge, is identified as a malicious redirector. The presence of a link farm and a malicious redirector suggests an attempt to lure users to malicious content, likely as part of a phishing or spam campaign.

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=indice+de+sensibilit%25C3%25A9+a+la+marge
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_d8acc7fd0d7a489980e701c559c69d7f.pdf
    • https://static.usrfiles.com/ugd/b8c837_8bc0202a14354e588fc094bff3d3c6d3.pdf
    • https://static.usrfiles.com/ugd/b8c837_3192a14a0fbe4f5593de9274581fa9d7.pdf
    • https://static.usrfiles.com/ugd/89c6ad_b551720822eb4288a77265e058b94477.pdf
    • https://static.usrfiles.com/ugd/b8c837_9096d5bc6f8d4641a47c47d913564d34.pdf
    • https://static.usrfiles.com/ugd/b8c837_b78f99b4222b4a828ab3645a0b5c9f49.pdf
    • https://static.usrfiles.com/ugd/74a852_297b03a48e6f498e8f104fa9a87afc97.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0138/files/zifukixavi.pdf
    • https://cdn.shopify.com/s/files/1/0464/9156/6248/files/36669570379.pdf
    • https://cdn.shopify.com/s/files/1/0461/8944/5283/files/marvel_anthem_song_isaimini.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_off0000598d.bin
dda5acda376757744a9702203de7d3a59769f0a1ee6d89ecd80bd80821b323ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x598D 5480 bytes
font_01_sfnt_off00006bc0.bin
ae6cfbabb8e489ca60d31700fed56d258d393b74026071ec6a64c8e6e5e2b96b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC0 11260 bytes

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