Malicious PDF — malware analysis report

Static analysis result for SHA-256 656741976de81249…

MALICIOUS

PDF

44.0 KB Created: 2020-08-31 14:13:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b2165b608ba7a73b2ad824cb0e9be5d SHA-1: e34b3c0848ee752ad5ab63d0b57782eecaee77e6 SHA-256: 656741976de812497ccf20a18d22fc8c2586abfded70acba417040ccf184d416
202 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link to 'ttraff.com' and a large number of embedded links, suggesting a link farm or redirection tactic. The presence of a download button lure and password protection instructions indicates an attempt to trick the user into interacting with malicious content. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest a malicious workflow, likely involving a second-stage download or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.com/pify?keyword=carrom+3d+game+pc+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4790/2622/files/62493610843.pdf
    • https://cdn.shopify.com/s/files/1/0434/1917/3029/files/trois_petit_chat_chanson.pdf
    • https://cdn.shopify.com/s/files/1/0432/0047/9391/files/77217730509.pdf
    • https://cdn.shopify.com/s/files/1/0436/1604/3168/files/82782917185.pdf
    • https://cdn.shopify.com/s/files/1/0428/7217/6799/files/sony_a5100_video_file_format.pdf
    • https://static.usrfiles.com/ugd/e73fea_bc18996a7ecc4626ad46011fa6f53616.pdf
    • https://static.usrfiles.com/ugd/9374a7_a385e60ebeef45e8b18ff8625d7ba009.pdf
    • https://static.usrfiles.com/ugd/96768c_a4580cf00f674ca0b246632bed194f2c.pdf
    • https://static.usrfiles.com/ugd/b8c837_c91a8d6cd1764ee89fb98ba89efd4be0.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/gomoru.pdf
    • https://cdn.shopify.com/s/files/1/0429/0363/4079/files/64668084486.pdf
    • https://cdn.shopify.com/s/files/1/0465/4628/8798/files/36562850924.pdf
    • https://cdn.shopify.com/s/files/1/0433/8545/4757/files/bowufaf.pdf
    • https://static.usrfiles.com/ugd/b8c837_e96e6d9c99754abbb5a9873e870e0959.pdf
    • https://static.usrfiles.com/ugd/b8c837_d3e468f27454497a9e4fd1777e1e35e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_ea8f9bafac8d4216ac3cc7048b98a996.pdf
    • https://static.usrfiles.com/ugd/b8c837_19eb905ce2e84e5c9984de8a8255a2fc.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_off00006e9f.bin
9aef9cc20beba6d31e1957a956109c96054e93c368b198cfcd5e79bc5fa16d20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9F 5336 bytes
font_01_sfnt_off000080b4.bin
a970a7033ad42b76153d8c652cdc1e77ae7bd6777b329c1031babb0ede8184c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80B4 10156 bytes

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