Malicious PDF — malware analysis report

Static analysis result for SHA-256 17c649e160605cab…

MALICIOUS

PDF

42.2 KB Created: 2020-08-06 10:48:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a18ac00080d9921ee5dffde6b661ea6 SHA-1: 29bb3dd6c9b61809d857bab9222c960781408a68 SHA-256: 17c649e160605cabc90a9ac6db79f2e46b7721e86bf48bbc21bcc91769675177
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to PDF files, suggesting a link farm or SEO manipulation tactic. One critical finding indicates a direct link to known malicious redirector infrastructure, which is used to obscure the final malicious destination. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

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.
  • 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.cc/pify?keyword=adobe+camera+raw+9+tutorial+pdf
    • http://files.global-banking.net/uploads/1/3/2/3/132303147/7131920.pdf
    • http://files.camping-hire-and-sales.com/uploads/1/3/0/9/130969200/2691567.pdf
    • http://benikaxof.leonardcarney.com/uploads/1/3/2/6/132682124/rexata_famunum.pdf
    • http://files.mercy-reigns.com/uploads/1/3/1/4/131406893/lopapevivatadopa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/0707/4723/files/13855057214.pdf
    • https://cdn.shopify.com/s/files/1/0431/6676/1120/files/69247827429.pdf
    • https://cdn.shopify.com/s/files/1/0431/1128/4893/files/jekarupozadogu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/rilowujokik.pdf
    • https://cdn.shopify.com/s/files/1/0440/1030/7749/files/veganismo_libros.pdf
    • https://cdn.shopify.com/s/files/1/0428/3016/8230/files/7814316881.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zaxolaxowixinetubosi.pdf
    • https://cdn.shopify.com/s/files/1/0440/5864/0549/files/what_is_the_color_of_discord.pdf
    • https://cdn.shopify.com/s/files/1/0433/2313/0009/files/zizufovejenuxotenerujuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/7516/5594/files/fapukutanutukireboviriduf.pdf
    • https://cdn.shopify.com/s/files/1/0438/8657/5771/files/capital_letter_tracing_worksheets.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_off000066b1.bin
1c489cab4c86e4563383fd693086a6d2ebf88a82c5957c007d75df5d8cd33e57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66B1 5500 bytes
font_01_sfnt_off0000795d.bin
7fa34e25d488fc12d24ac9ae08e2e775e7f3c0d820d678094f535902854624a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x795D 10164 bytes

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