Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3235d25c46a1d17…

MALICIOUS

PDF

40.9 KB Created: 2020-08-23 01:47:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af3f8b1fa6168354fae27bb82f712b1a SHA-1: a381eb7f62c58ca9b436cb1e05f8f7f44388ef08 SHA-256: f3235d25c46a1d17a7f9e36800d09d8fdd11621c013f55b9032517d441501023
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary link, 'https://ttraff.com/pify?keyword=happy+birthday+flowers+images', is designed to lure users by appearing as a benign search result. This link leads to known malicious infrastructure, indicating a phishing or redirection attempt. The document body, though heavily obfuscated, contains the same lure text and the malicious URL, reinforcing the phishing intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=happy+birthday+flowers+images
    • http://wevopaba.zuyu66.com/uploads/1/3/1/4/131405965/komilebe.pdf
    • http://liwejox.aivets2018.eu/uploads/1/3/0/7/130775940/15342f56a.pdf
    • http://moxudena.moneygramvnvn.com/uploads/1/3/0/7/130739553/92b8144fbe5a.pdf
    • http://files.bodylabchiropracticandmassage.com/uploads/1/3/1/6/131637546/3e5fb.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/kuwukipe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53059057271.pdf
    • https://cdn.shopify.com/s/files/1/0454/0166/9800/files/asvab_for_dummies_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/9292/6883/files/introvert_vs_extrovert_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/6911/1448/files/53477664490.pdf
    • https://cdn.shopify.com/s/files/1/0432/9652/2398/files/atriplex_plante_mdicinale.pdf
    • https://cdn.shopify.com/s/files/1/0428/4294/7750/files/13569632629.pdf
    • https://cdn.shopify.com/s/files/1/0431/7341/3028/files/year_planner_2019_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/6392/7206/files/waxob.pdf
    • https://cdn.shopify.com/s/files/1/0433/4046/4281/files/pojof.pdf
    • https://cdn.shopify.com/s/files/1/0434/6763/6898/files/wefunuxevovijadej.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_off0000609d.bin
067d0d6c78b5eea3b73f337b2885fe38b3115b699509ac162fcebe0be824c8d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x609D 5748 bytes
font_01_sfnt_off0000741b.bin
c4c26d622fa8a7cbe1036ff8ca25d76329ad449d524cd9cc36b1c79f26a22753		 pdf-font-stream PDF embedded font (sfnt) at offset 0x741B 10228 bytes

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