Malicious PDF — malware analysis report

Static analysis result for SHA-256 73a6d120c088d413…

MALICIOUS

PDF

40.2 KB Created: 2020-09-06 16:17:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3d4dd08fcae774787e1eba8604a501f SHA-1: b20a6d79c94308867763507ffe0c4720a4521b6b SHA-256: 73a6d120c088d4136d8296bff1821cc02a3dd0c2bb5ece326edd5a2feeab9242
162 Risk Score

Malware Insights

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

The PDF contains embedded links and text suggesting it is a keygen for Autocad 2015, a common lure for malicious downloads. The primary link, https://ttraff.me/wix?keyword=autocad+2015+keygen+free++32+bit, is flagged as a malicious redirector. The document also contains a large number of other links, suggesting a link farm designed to distribute malicious 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.me/wix?keyword=autocad+2015+keygen+free++32+bit
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/cb4a18_612491643e924617a3507370c850646d.pdf
    • https://static.usrfiles.com/ugd/5a4aad_d006f6e25c48462e8c41c94cc691afa0.pdf
    • https://static.usrfiles.com/ugd/0f9ef0_9f040a713fba429782f3c36ec9653067.pdf
    • https://static.usrfiles.com/ugd/0e6328_c56b9825ea624b0c85fb0121d4b2caaa.pdf
    • https://static.usrfiles.com/ugd/83f04e_6205ef46903a4e2d91c1d614d07357a8.pdf
    • https://static.usrfiles.com/ugd/68ec51_71e27509d8b8442a972e29089e376bcc.pdf
    • https://static.usrfiles.com/ugd/2eedf1_d1b1bb63e7084c1188191ece40ee9e86.pdf
    • https://static.usrfiles.com/ugd/ab922d_5cb827a79cf84118a8068dd3920c2773.pdf
    • https://static.usrfiles.com/ugd/e481ce_36795c0a224d4facb8d260220a06c4f4.pdf
    • https://static.usrfiles.com/ugd/544e7e_3e25298cd36648ae8d21c49bd854963a.pdf
    • https://static.usrfiles.com/ugd/455f95_d9bd06e7dd3947a5825f6ee20db80053.pdf
    • https://cdn.shopify.com/s/files/1/0439/1724/6632/files/nesonoxogekaxideralogoru.pdf
    • https://cdn.shopify.com/s/files/1/0434/1720/6946/files/77007922459.pdf
    • https://cdn.shopify.com/s/files/1/0433/4505/1797/files/datopiwifuk.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_off00005dc9.bin
bb29b1b06cafe76925dd70f4f3d51e6e9536f072b5cf59b952fb35e5b360d7a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC9 5888 bytes
font_01_sfnt_off00007201.bin
2ea0aa877561d07539943527f44c1c12b5bbdccce54685365d3079f09f5581cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7201 10052 bytes

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