Malicious PDF — malware analysis report

Static analysis result for SHA-256 4208c129d7340e38…

MALICIOUS

PDF

47.2 KB Created: 2020-08-14 02:47:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09087d451cd1d84add7cdd4fdb9ee84b SHA-1: 044bfbc3bf68273c91786276590f6adf5c482c60 SHA-256: 4208c129d7340e384065cb74245e7b82c09376c0d25274740f4a4db35c910400
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL and keywords related to a "Desynthesis guide ffxiv", suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on Shopify. The ML classifier 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.cc/pify?keyword=desynthesis+guide+ffxiv
    • http://files.chickskicksboots.com/uploads/1/3/0/8/130874332/bamiwimimifip.pdf
    • http://files.melindacochraneauthor.com/uploads/1/3/0/8/130874257/xazivuga-letekikuzitulo.pdf
    • http://files.campkuringgai.com/uploads/1/3/0/8/130813362/a0af0d83e.pdf
    • https://cdn.shopify.com/s/files/1/0438/8664/1304/files/vufeborixedatemozag.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/desawifolajajipabupila.pdf
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/laxoripota.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/53885204646.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7070/files/report_on_web_designing.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1560/files/32192312145.pdf
    • https://cdn.shopify.com/s/files/1/0432/3767/1080/files/microwave_spectroscopy_applications.pdf
    • https://cdn.shopify.com/s/files/1/0438/6196/7013/files/11552271753.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wekisod.pdf
    • https://cdn.shopify.com/s/files/1/0435/7311/7096/files/logic_gate_project_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/ladugeru.pdf
    • https://cdn.shopify.com/s/files/1/0432/9567/0432/files/wolofamesivuxeta.pdf
    • https://cdn.shopify.com/s/files/1/0433/3538/5243/files/28038087408.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gamusuzojikifikukudubug.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007add.bin
7bb4d2f998c9c1265a9b5da3185a17a27f45376f8ddf4c3bb37c118b1443d42b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ADD 5060 bytes
font_01_sfnt_off00008c29.bin
f5d896524b50e3d0ed1b4c452d462d65dfaf2dce77ea98d9e3bda5e98c1f7a74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C29 10392 bytes

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