Malicious PDF — malware analysis report

Static analysis result for SHA-256 d17d25d4d617e0b0…

MALICIOUS

PDF

45.4 KB Created: 2020-08-29 13:02:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a170d7fe6c5f997f1f14549239f65c67 SHA-1: 1b1be1ab489228f7566278f7e933f316cc14b783 SHA-256: d17d25d4d617e0b05b9a77018977342cbcf9acc713c2cc53034c19386f45b12b
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to malicious content. The document body, though heavily obfuscated, appears to contain the same URL and references a document title related to FDNY rescue company operations, likely as a lure. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious content.

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=fdny+rescue+company+operations+manua
    • https://static.usrfiles.com/ugd/b8c837_4cea11174dbc44afa9a07ec8658a7a10.pdf
    • https://static.usrfiles.com/ugd/b8c837_3654629aa2064e9a974cda5dc80845c2.pdf
    • https://static.usrfiles.com/ugd/b8c837_627f96bf1c454a9d8d855841d8b2b7e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_6dec61e7e5da4d4fb8f6a35a122a5161.pdf
    • https://cdn.shopify.com/s/files/1/0429/9322/1783/files/48054084431.pdf
    • https://cdn.shopify.com/s/files/1/0436/0817/8845/files/radio_frequency_and_antenna_fundamentals.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50537202024.pdf
    • https://cdn.shopify.com/s/files/1/0437/6163/1384/files/noida_extension_map.pdf
    • https://cdn.shopify.com/s/files/1/0434/5056/4773/files/fha_streamline_with_appraisal_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/5332/6242/files/lifed.pdf
    • https://cdn.shopify.com/s/files/1/0440/7492/6230/files/universal_audio_ox_box_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/remote_office_not_required.pdf
    • https://cdn.shopify.com/s/files/1/0434/2022/1607/files/cholestasis_of_pregnancy_rcog_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0435/4693/5447/files/67879313573.pdf
    • https://cdn.shopify.com/s/files/1/0429/5757/0207/files/asientos_contables_ejercicios_resueltos.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/pafufeg.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_off00007531.bin
88b4ba35911bd3bb2f9de1f7db54d7549beaa65cfaeac03bc01629d7a6793103
pdf-font-stream PDF embedded font (sfnt) at offset 0x7531 5244 bytes
font_01_sfnt_off000086ee.bin
ad5bbf4d28386244a0131951b8016992cb220e2b6c113a70216d1c21bc89c918
pdf-font-stream PDF embedded font (sfnt) at offset 0x86EE 9908 bytes