Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a3313df1de92b8c…

MALICIOUS

PDF

39.6 KB Created: 2020-09-02 05:11:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3674eb5f5b2bf0af90d3e8a04bb6b467 SHA-1: 918cb429afbbd5772c04489b9f803980c0ad5376 SHA-256: 6a3313df1de92b8c03d94af9cb458b4a1b9891aaedf61a7f4b352b9863b25df6
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 infrastructure, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The embedded URL, https://ttraff.com/wix?keyword=procedimento+cautelare+uniforme+wikipedia, is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious redirector link suggests an attempt to lure the user to a compromised site, likely for further exploitation or credential harvesting.

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.com/wix?keyword=procedimento+cautelare+uniforme+wikipedia
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_a17e330b4a9c422fb9b634a2ac92d295.pdf
    • https://static.usrfiles.com/ugd/3ceeb9_6ccdd85c1f4343a0b13c64ac899f1715.pdf
    • https://static.usrfiles.com/ugd/b8c837_931d0a0c3bc14781aecbc1dd32e2fcaf.pdf
    • https://static.usrfiles.com/ugd/e643da_59599054853f4efe8607769c92969a25.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/77145261620.pdf
    • https://cdn.shopify.com/s/files/1/0429/5180/3036/files/assamese_new_audio_song_2018.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/gajatexoxekifuku.pdf
    • https://cdn.shopify.com/s/files/1/0428/4655/2227/files/ralokaj.pdf
    • https://cdn.shopify.com/s/files/1/0436/0388/6238/files/17976328587.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_off00005d1b.bin
ba387441e1f60ebbe150b57316945f038dceca17cf7fe8a2a7febfe4b7c4ef25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D1B 5280 bytes
font_01_sfnt_off00006f10.bin
0872d7dfda7d3c03ca615c4fd0259b653141d5573e91b20837d9adb52553e29c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F10 10764 bytes

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