Malicious PDF — malware analysis report

Static analysis result for SHA-256 1728eea8d518a68d…

MALICIOUS

PDF

36.8 KB Created: 2020-08-31 02:22:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dcdf501743aae70bcb7bdd8aa3632141 SHA-1: 6cb9582e4dcc1b28d4da99d061f1f8c8d46ce28b SHA-256: 1728eea8d518a68d7088b039e6c8116a18ff2054070c2f6b5b15e16d95d351bc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded URLs and a document body that attempts to trick the user into clicking a link related to 'NCL getaway deck plans'. The primary malicious URL, 'https://ttraff.cc/wix?keyword=ncl+getaway+deck+plans', is flagged as a malicious redirector. The PDF also hosts a large number of external PDF links, many of which point to benign content, suggesting a link farm or SEO manipulation tactic to obscure the malicious redirector.

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=ncl+getaway+deck+plans
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/5420/3031/files/10th_tamil_book_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11085861466.pdf
    • https://cdn.shopify.com/s/files/1/0431/9785/7954/files/72299499363.pdf
    • https://static.usrfiles.com/ugd/3e5d97_02d7a70133204bcf8058f46570d7d80a.pdf
    • https://static.usrfiles.com/ugd/b8c837_bddf7b4514c247c1be2646bd05302187.pdf
    • https://static.usrfiles.com/ugd/b7306e_7797de002fbb4b3a8329ac68d542c15c.pdf
    • https://static.usrfiles.com/ugd/b8c837_b11fb9b6e82542b783bc017fea5d10af.pdf
    • https://static.usrfiles.com/ugd/822ecd_373b0151c5ef49289fd88a5974c4e9e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b1bded44bc649df9930a58778dcf501.pdf
    • https://static.usrfiles.com/ugd/38eac1_8223f2a06f4e46a4ab4d6f90f251612f.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_off0000452d.bin
f59dbc33303a325ead1e1b9b602c9eb3a5cb1e33cf59479ccee860911286c68a
pdf-font-stream PDF embedded font (sfnt) at offset 0x452D 5004 bytes
font_01_sfnt_off00005657.bin
7f55e686f63fff031040302f8a5ab4a257c46f0b99bf2986383bf6ad2475cd30
pdf-font-stream PDF embedded font (sfnt) at offset 0x5657 10084 bytes
font_02_sfnt_off000078f8.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x78F8 4324 bytes