Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c51cd4d236de759…

MALICIOUS

PDF

45.3 KB Created: 2020-08-20 21:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f6a837386f0edd74e03e00250df8af7 SHA-1: 55e79bae17e08cca93975f02db2fbcf9dfcc2faa SHA-256: 7c51cd4d236de759fa245ad02477c585a50abb040cff04977c04983e20f9622f
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to citation styles and includes the same redirector URL, suggesting a lure. The presence of a link farm heuristic further indicates malicious intent to drive traffic to external sites. No scripts were extracted, but the PDF structure and embedded links point to a phishing or redirection attack.

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=chicago+manual+of+style+footnotes+multiple+citations
    • http://files.daltonwebly.com/uploads/1/3/2/3/132302970/woxerarowotibuk_kexowebedasifil_dizavujex.pdf
    • http://files.enads.org/uploads/1/3/1/4/131406811/f7b796d3c7.pdf
    • https://cdn.shopify.com/s/files/1/0431/6508/9941/files/hook_to_load_checkout_scripts.pdf
    • https://cdn.shopify.com/s/files/1/0437/8938/5885/files/bigo_live_ing.pdf
    • https://cdn.shopify.com/s/files/1/0436/1751/7731/files/aprender_a_dibujar_rostros_realistas.pdf
    • https://cdn.shopify.com/s/files/1/0434/2009/0517/files/welutalawawud.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0979/files/desot.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6976/files/gesoxovageme.pdf
    • https://cdn.shopify.com/s/files/1/0454/3725/5838/files/84977549903.pdf
    • https://cdn.shopify.com/s/files/1/0429/5681/6540/files/mewelama.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_off000072fc.bin
70dfc43f380df4beffd9e66b97061f2599fbae001d4bbfb3dec75feea94dbc0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72FC 5340 bytes
font_01_sfnt_off00008514.bin
ca774e18abb974f079e1d6194bc304ee8aae8c88920e60bdb366c38e7f14bd84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8514 10320 bytes

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