Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e3f1012487ac7ae…

MALICIOUS

PDF

40.1 KB Created: 2020-08-30 03:02:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5cc39ab0f28da5c0b51ecbb3275e7e97 SHA-1: b34706897da18c3ca098c3c8b099b2b4bd0ff6ca SHA-256: 6e3f1012487ac7aea2c6d3ae5924e45f43266efa139b1ec6df3102aa9fc88618
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to known malicious infrastructure, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains the same malicious URL and a list of other PDF links, indicating a link farm designed to drive traffic to malicious sites. The ML classifier also strongly indicated maliciousness.

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.ru/wix?keyword=electric+smart+car
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_1bdc95b42e6642598840b247177bcbaa.pdf
    • https://static.usrfiles.com/ugd/b8c837_22813a1d775f470e99dea0f87da2c60b.pdf
    • https://static.usrfiles.com/ugd/c7a620_a6f72810c92743eba2636ebf73b5b9cd.pdf
    • https://static.usrfiles.com/ugd/b8c837_d824dd26c0dd4b38ba26063f9bb9d10e.pdf
    • https://static.usrfiles.com/ugd/2b25b5_da1be6692edc4637865e3509ba17dbbd.pdf
    • https://static.usrfiles.com/ugd/39cb9d_8e9e4fd331864929ba3e10948a77f785.pdf
    • https://static.usrfiles.com/ugd/b8c837_8a0b6046ad114dd39fdaab408f25ea4d.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_cde8646b0eba4c11be7cb4a3321da300.pdf
    • https://static.usrfiles.com/ugd/227d0f_a195936988e349dd8f3dc88edef2a0db.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0018bb3149a436194e978a19552e0c3.pdf
    • https://static.usrfiles.com/ugd/24853a_a0358bc6e76d4fd3b0d64b084d316256.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f400e71323044a0907474fc5acfc8b7.pdf
    • https://static.usrfiles.com/ugd/a298ce_608c29336f8c4d8cb73603161113db74.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
c642659f25cd981e52fec9792108c127eb0650456dc92282f50d86ebd6e4ed56
pdf-font-stream PDF embedded font (sfnt) at offset 0x6043 4904 bytes
font_01_sfnt_off000070d1.bin
650b14e6d3145209dd44afafbbe905982187decd1b4948545ef082d98a323c94
pdf-font-stream PDF embedded font (sfnt) at offset 0x70D1 10332 bytes