Malicious PDF — malware analysis report

Static analysis result for SHA-256 fce74b1e2b107d79…

MALICIOUS

PDF

64.2 KB Created: 2020-08-30 07:20:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 074ea15576c053426642afdd91b365a0 SHA-1: 4a038ac7635bca0d8b40d5150ee27c46cd1c8788 SHA-256: fce74b1e2b107d7972eb65815a2366d4e243b143a69f7ccc9dc08903295d777a
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a large number of external links, many of which point to a redirector service. One of the primary URLs extracted, 'https://ttraff.cc/wix?keyword=alamo+dart+schematic', is identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain this same URL, suggesting it is the intended destination for users interacting with the PDF. The presence of a link farm and a malicious redirector strongly indicates an attempt to lure users to a harmful site.

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.cc/wix?keyword=alamo+dart+schematic
    • https://static.usrfiles.com/ugd/b8c837_2c1c2a3713ab43eab5e5e0d28b856f2c.pdf
    • https://static.usrfiles.com/ugd/353d00_6f29afeff5f447fc9bd65d0cddb69a5e.pdf
    • https://static.usrfiles.com/ugd/b8c837_a7e816df90f84078a149fb3bc402d79b.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c9f39ed0de14c4eb5c44c0f4445f9c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_40f97e0fbb804426817f6eb5bfaa3cf0.pdf
    • https://static.usrfiles.com/ugd/b8c837_34660902ac7545cfbb8a3f9c8db5ca92.pdf
    • https://static.usrfiles.com/ugd/cec570_e259c9e28b6a4582be30d757b70182ca.pdf
    • https://static.usrfiles.com/ugd/f967ac_45d424b889f14360b53a69b5ab7fca54.pdf
    • https://static.usrfiles.com/ugd/bf650e_6a55bc0ef2c8445b881c3893a53458b7.pdf
    • https://static.usrfiles.com/ugd/0dd040_fe8cdf4e004f41e0b0a5e3727807ec3c.pdf
    • https://cdn.shopify.com/s/files/1/0435/7799/9519/files/sonakigijifigujinokuxik.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nubizasijimowedemo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3171/4202/files/mexedenazinalozoxinobas.pdf
    • https://cdn.shopify.com/s/files/1/0437/4619/7653/files/loketutasejom.pdf
    • https://cdn.shopify.com/s/files/1/0431/1931/3053/files/56380962626.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_off0000b36e.bin
85862e32c5d4451551157f3749a90902dc7e30cc35b27e4f726d56f2d04455fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB36E 5168 bytes
font_01_sfnt_off0000c4d6.bin
87336c7d9122626da34b57698770ab2d858ecd2ab8aef95e21ec8c7cf190e005		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4D6 15452 bytes

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