Malicious PDF — malware analysis report

Static analysis result for SHA-256 80db3686f81d6ce1…

MALICIOUS

PDF

47.3 KB Created: 2020-08-30 20:53:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8f3865c4a81d45e9c2ec21747706561 SHA-1: d4dad9a2ddd42eb7688eeb1bd4da76bcdb1a8a69 SHA-256: 80db3686f81d6ce177770c9a1ab0007e7f2aaa31cfe12665860a60a2413bd45d
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL associated with a redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for search engine optimization, directing users to a malicious URL. The presence of numerous external PDF links further supports the link farm heuristic.

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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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.com/wix?keyword=disney+coloring+bookmarks
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/c83fdb_aff463fc4f12420d9c8e23433e42bf1b.pdf
    • https://static.usrfiles.com/ugd/0a052f_7ecdf28d8fb9427c815d3e53f887e2c4.pdf
    • https://static.usrfiles.com/ugd/2486b5_14c2d5a1701e4599a76aa31e5cf1c37e.pdf
    • https://static.usrfiles.com/ugd/3b47cb_9c63eefcf85c4c0a8575878d5108fb7d.pdf
    • https://cdn.shopify.com/s/files/1/0434/8634/7430/files/ayatul_kursi_shia_full.pdf
    • https://cdn.shopify.com/s/files/1/0429/8211/3433/files/xuxokakuxam.pdf
    • https://cdn.shopify.com/s/files/1/0451/0639/7337/files/black_s_law_dictionary_ebook_free.pdf
    • https://cdn.shopify.com/s/files/1/0446/9525/7244/files/how_to_add_adobe_to_outlook_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/5848/6678/files/hannibal_movie_hdpopcorns.pdf
    • https://cdn.shopify.com/s/files/1/0431/4248/0021/files/91654712245.pdf
    • https://cdn.shopify.com/s/files/1/0431/9127/1586/files/90733352746.pdf
    • https://static.usrfiles.com/ugd/b8c837_1ee15f9768ff431da18dc53e9745b7ac.pdf
    • https://static.usrfiles.com/ugd/b8c837_afbbf7799a4b480da77fbf1ed771e870.pdf
    • https://static.usrfiles.com/ugd/d99ef3_40e0b104aa9a4c99be2576b546bdc7db.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_off00007cf3.bin
c9c059d9d91ad8894b4d248ce3c143b39a57d88c9fada01eba94af5f3ede757b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF3 5424 bytes
font_01_sfnt_off00008f5b.bin
0f009fdd97173a56cf702e5b5feac244dc82b1f219d2b55c7cf2354375af1681		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F5B 9816 bytes

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