Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab989423e1d4800…

MALICIOUS

PDF

43.4 KB Created: 2020-08-31 19:35:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 453e50781cda5809d679630a376b0938 SHA-1: d277b0cd32bd0a4807d737344d26ad3caf18ffbe SHA-256: 6ab989423e1d480035799d04d6c979dd5415123d6682cf876e85d84cd95a9a36
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are benign Shopify URLs, but one critical link points to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to trick users into visiting a malicious site. The presence of embedded JavaScript, though not directly analyzed here, is often used in PDFs to facilitate malicious redirects or exploit vulnerabilities.

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.cc/pify?keyword=team+fight+tactics+scarra+cheat+sheet
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0463/1416/0290/files/flight_simulator_x_steam_edition_demo.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/61273183393.pdf
    • https://cdn.shopify.com/s/files/1/0428/1466/8959/files/11950524191.pdf
    • https://cdn.shopify.com/s/files/1/0435/3887/4532/files/managing_business_process_flows_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/1760/9122/files/bivelulununizefatawawaxa.pdf
    • https://static.usrfiles.com/ugd/d5415a_ce1f056916a6494195c49637e477b818.pdf
    • https://static.usrfiles.com/ugd/18f527_7752936d6b6045c7beedaf89e80dfe42.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f5bba800ccd4f6a971630877d8a7326.pdf
    • https://static.usrfiles.com/ugd/d216cb_1f0375280235492784d65cf6bd55a919.pdf
    • https://static.usrfiles.com/ugd/dc98cc_eff9e05a3bae4b5e8edbc63f306f6310.pdf
    • https://static.usrfiles.com/ugd/7d21c0_8c93ce1317a64416a508ee529158ae96.pdf
    • https://static.usrfiles.com/ugd/2b3f46_8c97f45445684f919372900d952d1f17.pdf
    • https://static.usrfiles.com/ugd/b80405_b4224057f3fe4c4eb047216948405617.pdf
    • https://static.usrfiles.com/ugd/565485_6286f8e59992444d879b2cd8b2f49638.pdf
    • https://static.usrfiles.com/ugd/66c878_b31c7707f9174cf99447ca2d22855440.pdf
    • https://static.usrfiles.com/ugd/b52961_ed2fa3d54954429db82697d33417e36f.pdf
    • https://static.usrfiles.com/ugd/9d66c7_303e8aad7ff54398844a67b2ec256f64.pdf
    • https://static.usrfiles.com/ugd/ae15ca_544394cfa3c2426f8fbbfe67a6bbd65c.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_off00006c0c.bin
cf6aa205dfb3b1373b6543d27b7997d608e91c9b039dcec07aebb47271aef030		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0C 5212 bytes
font_01_sfnt_off00007da5.bin
494ff64fa842bd07032cbec60928fbf52dd8e32c17520f850cf6abc8b5528bb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA5 10292 bytes

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