Malicious PDF — malware analysis report

Static analysis result for SHA-256 60ca2a8004205fb4…

MALICIOUS

PDF

40.5 KB Created: 2020-08-30 11:06:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aaefbcac3974cac3d31480884d524f65 SHA-1: 2fb0c04b021df7b3f4d23cbba515a7a91e09b45b SHA-256: 60ca2a8004205fb415d39e334e4a91376a297e731859929b65063b65a911dcce
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=ludgero+fotografo+setubal+portugal+p'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external PDF links, many of which are benign. The ML classifier strongly flagged this PDF as malicious. The embedded URL is likely intended to lure the user to a malicious site for phishing or malware delivery.

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.club/wix?keyword=ludgero+fotografo+setubal+portugal+p
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/cbe7f7_4a2cb2c06ff34a48b9e646a2c0737b3b.pdf
    • https://static.usrfiles.com/ugd/b8c837_2dc5fa4aef0642abb8432000f11f9378.pdf
    • https://static.usrfiles.com/ugd/b8c837_c3a0684e3e0f4a4e8832b2a17d4eba19.pdf
    • https://static.usrfiles.com/ugd/45e30f_736af083b7eb4f9aa318f9754d8021ba.pdf
    • https://static.usrfiles.com/ugd/b8c837_378f41b42f414a37bd4cc1379b8527a7.pdf
    • https://static.usrfiles.com/ugd/b8c837_67a5ee8dde504dfd8d09119a4d987df7.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b344450f25b49bf95e1d2fa05b85f01.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d9449bcc04a4a73972dae8474ec9713.pdf
    • https://static.usrfiles.com/ugd/b8c837_f779e3177c6c41ce8b098aed11ba1568.pdf
    • https://static.usrfiles.com/ugd/b8c837_3965226ac8f9493e9a7333be8078ceb5.pdf
    • https://static.usrfiles.com/ugd/b8c837_882974bfd91d4483abc4bc256aa23e76.pdf
    • https://static.usrfiles.com/ugd/2b3f46_8e116ffa59454f5e921d94445757fd5c.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_off00006043.bin
25b0f39e6d75b4233762e1692bc6424c2ce3c82277490f3e4e778e6899e3622c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6043 5288 bytes
font_01_sfnt_off00007245.bin
17aacab804b51b101967cd6787f33a364a60cbe1598bb4ccb574a35a5e7a69b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7245 10288 bytes