Malicious PDF — malware analysis report

Static analysis result for SHA-256 6717a86912225740…

MALICIOUS

PDF

47.5 KB Created: 2020-09-09 08:59:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efbd72839b9973ef04fd5767ef161d87 SHA-1: 6f4d5e3f3ef1d1146b5c1c0d75bf264ae33366e3 SHA-256: 6717a86912225740384adf852fc5ae288fc3fd74f96cf5041a6b1804303965c9
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one to a known malicious redirector at 'https://ttraff.link/wix?keyword=lioden+breeding+items+guide'. The document body, though heavily obfuscated, also contains this URL and references to other PDFs hosted on static.usrfiles.com, suggesting a link farm designed to distribute malicious content. 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.link/wix?keyword=lioden+breeding+items+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/8a9bcc_ad0954d135f14937ab07f174deb585ec.pdf
    • https://static.usrfiles.com/ugd/d4df0f_2b2749dddcdb40948eb1f7cf6cb785bf.pdf
    • https://static.usrfiles.com/ugd/e23fbb_1ed8a5e9db3f4dd4a85cc8ccc0031f1f.pdf
    • https://static.usrfiles.com/ugd/b8c837_7df349b8dad545d58ed9b50e11a55cc5.pdf
    • https://static.usrfiles.com/ugd/1f6d71_9067e4fb8c85492cbb3bf337c9e39d44.pdf
    • https://static.usrfiles.com/ugd/eeb7bd_45b48238b8cf46e69b6a3754e2d9eca9.pdf
    • https://static.usrfiles.com/ugd/370ea2_799b926bb7554451ae016c0362ab1132.pdf
    • https://static.usrfiles.com/ugd/8d0191_05d7ae9949604e8d94bec3fdc32fbeb1.pdf
    • https://static.usrfiles.com/ugd/50de67_c0f84c8f366247aaaf71dc3dd6a33c33.pdf
    • https://static.usrfiles.com/ugd/0b46e6_be1b96d1665245c68a448dde144a1baa.pdf
    • https://static.usrfiles.com/ugd/e56fe2_a7abc6d3d5a441ab8632abd4cc1f8f87.pdf
    • https://static.usrfiles.com/ugd/b8c837_92488ebecacd42a48bb8969f0ff89d03.pdf
    • https://static.usrfiles.com/ugd/b8c837_b24d0f4f2f92465e83538cb48651541f.pdf
    • https://static.usrfiles.com/ugd/eddc50_60a7c30e87104836abfa4e4ab75f1b95.pdf
    • https://static.usrfiles.com/ugd/b8c837_fae49135642142e999509e05cca976d6.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_off00006e93.bin
76fb61354dcf88c3d67a4b6c0f154fbf67b4001b61f14e7bec1d018c1e1d3752
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E93 4984 bytes
font_01_sfnt_off00007f72.bin
d2901b6786d9ae40c65d31a92b3ffd1a6d0a0403aca25267308a3d0e3a9f51fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F72 15912 bytes