Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cd010201dae08db…

MALICIOUS

PDF

43.7 KB Created: 2020-09-03 01:54:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 787feca5fe7296c793bdeef62ce6bdf1 SHA-1: 137a0c26e0c68df18fa2a09e1206352bdbcddaa3 SHA-256: 5cd010201dae08db364707e495f15942653c8728c31df178ae7c8e0261cef1a2
162 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a link farm designed for SEO manipulation. One prominent link, 'https://ttraff.cc/wix?keyword=adm+apk+for+pc+free', is identified as a malicious redirector. The presence of a 'download button' heuristic further suggests a lure to download content. While no scripts were explicitly extracted, the PDF structure and link farm indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/wix?keyword=adm+apk+for+pc+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_3e917a9ebfc84f4cb7f12620469f7aeb.pdf
    • https://static.usrfiles.com/ugd/97493d_8f414751055544f2b556c4e6ba92979f.pdf
    • https://static.usrfiles.com/ugd/0047a4_761e84ebc1834db8950a9cbbdb4caeb5.pdf
    • https://static.usrfiles.com/ugd/b8c837_f160cccd797b40dc8753f7f406c2e438.pdf
    • https://static.usrfiles.com/ugd/b88e3d_f14842f9fd234549be02fa0ce97b4ba6.pdf
    • https://static.usrfiles.com/ugd/a98ecc_02a85e0e1c45474ca1e918dcc17899b0.pdf
    • https://static.usrfiles.com/ugd/97493d_c07a911bd3ad4533b18ce6f8b77c1bd8.pdf
    • https://static.usrfiles.com/ugd/07e02c_55474e83ff7d4fcf82f69ff17d11e1e1.pdf
    • https://static.usrfiles.com/ugd/c162b3_7ebbd8e548234e6480406d1bfe4e4d3f.pdf
    • https://static.usrfiles.com/ugd/23e9be_7c443e3ea81442e0997279dc44e33a76.pdf
    • https://static.usrfiles.com/ugd/a4d998_3837490fe96644399d690690a4b34b3c.pdf
    • https://static.usrfiles.com/ugd/b8c837_051ad0a2673f4287b6d7440a6db212f2.pdf
    • https://static.usrfiles.com/ugd/682d1c_00d23599be264b838d1d9deea06664fc.pdf
    • https://static.usrfiles.com/ugd/49f5ef_8e9e0be56a9b4d7f9d79311c276fb4a1.pdf
    • https://static.usrfiles.com/ugd/3b5dd9_97049dfda8594c1fbb35b3c54f389fac.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_off00006e14.bin
b5a2e237219c6b7ce09aeffc1e04ebfef21e6232bea1158390aac740d7f1d438		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E14 5144 bytes
font_01_sfnt_off00007f87.bin
1c757d54f20d62f9fbd3f48046a0a0f566ca6fe2e2f4c799ab5e55ef33770e69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F87 10024 bytes

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