Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c18a78ff3e3d64…

MALICIOUS

PDF

40.8 KB Created: 2020-09-08 07:42:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 27a6019699dd43b8d142ea9d68fea4d7 SHA-1: a7036b1489621c9f10dc80aa5d64ba4ee6b60620 SHA-256: 60c18a78ff3e3d64925b21c52ea238156dd2a9a69bfd994445af55a70ecc5e28
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://ttraff.club/pify?keyword=aspera+connect++mac. Additionally, it exhibits characteristics of a PDF link farm, with numerous external PDF links. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lure users to malicious sites.

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/pify?keyword=aspera+connect++mac In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/f80014_f04b1a358d184e9fa4d6e21dac81ac82.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3fb742_c8a1f177e1cc4907bc0724de1fda10c9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8e9e2f_1beb7376931743d49889f4595fc4d1dc.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f90bad_2165cad02eaa4d68b0980321adfd21ee.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1cc7e8_879b66add08f4d4698534a4ae1fff170.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bdeb4c_43e753c64c484c459fcffe88f3015bf4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b65acf_f8411a5e55474e16a82d9b68d89481f0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a2e20a_22945e9033f94c789c12a192118bafe6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/21e6f2_a6f7c83b0a2d444bbb43a1b5ec0d4ce4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3eed2b_06020730d872438ea3a51782cd469d87.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2e79a6_e4f51f4d81554f2f9a0eedc312439a91.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bb13a2_d168a05bc6714256bb534ef53a65a795.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b88e3d_623dd3fdba8f49a4b1e87afad228eb5b.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6196 5036 bytes
SHA-256: 10eadabe39ef4c8b2d28bb5d646fe1f7f0da8b8da43145614f9ccbfca593b329
font_01_sfnt_off0000729e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x729E 10528 bytes
SHA-256: f71cb4a541340f1e847f9c83c67aa5f7f59e325959604f58d331afce9d2357d4

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