Malicious PDF — malware analysis report

Static analysis result for SHA-256 63a4e59ca93f94e1…

MALICIOUS

PDF

37.6 KB Created: 2020-09-05 19:45:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51cc3aff4d891cbe191ff37bf6f9594a SHA-1: 1c2b942045b14aed66c9c5e4c3056eb178baa3bc SHA-256: 63a4e59ca93f94e14df205c47333169ab89a4b7b213dae2cba279e7e7d1b1ae2
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The embedded URL and document body text suggest a lure to download software, likely a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

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.me/pify?keyword=solidworks+2018+basic+tools+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/2199/7979/files/xajinijixepunawusolu.pdf
    • https://cdn.shopify.com/s/files/1/0457/9970/2694/files/ambareesh_film_songs.pdf
    • https://cdn.shopify.com/s/files/1/0430/2172/9955/files/zoxosutazixa.pdf
    • https://static.usrfiles.com/ugd/cbe325_80fd216017994f27ac89bd54c46aa951.pdf
    • https://static.usrfiles.com/ugd/b8c837_edf4106c0a0e41e5a984b6f7c6dfa00c.pdf
    • https://static.usrfiles.com/ugd/d2057d_c2b92e7b267e4ca6bfb5fe6c7debde12.pdf
    • https://static.usrfiles.com/ugd/86319b_d03ca2d6c5b149e6b3c60842dda39c45.pdf
    • https://static.usrfiles.com/ugd/eb4c03_3e68be462d7b4fdd8b152b994d1642ea.pdf
    • https://static.usrfiles.com/ugd/430cb2_682dccf0aec74cb29d5e8f80850ff932.pdf
    • https://static.usrfiles.com/ugd/253000_f9685549028d48139cc54643221603d7.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e0d82353fcf42f18595ed52e8a2d523.pdf
    • https://static.usrfiles.com/ugd/e8e253_4196911158c84b48b882420233ecf1d5.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6472/files/material_para_aprender_espanhol.pdf
    • https://cdn.shopify.com/s/files/1/0434/3745/7575/files/20681352196.pdf
    • https://cdn.shopify.com/s/files/1/0429/3784/3871/files/mla_format_character_analysis_example.pdf
    • https://cdn.shopify.com/s/files/1/0434/7494/4153/files/zetajefexiv.pdf
    • https://cdn.shopify.com/s/files/1/0434/4158/6332/files/41432565034.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_off0000531d.bin
2c92d685899d3d6ac5ed3852c9c9c0dc176e992a246a6f23a28d92e7edea6dce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x531D 6068 bytes
font_01_sfnt_off000067ea.bin
37bd2d9796fdf38a30868b7e8d95261e6df611b4e5b540f80fb1c3cec3efe084		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67EA 9772 bytes

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