Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4d36a56fcadb17d…

MALICIOUS

PDF

40.6 KB Created: 2020-08-29 22:13:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8246a51263645f8a6047a73c33c38e1 SHA-1: 370b3c90694a9a9c9085563eeed30ae1954d89ce SHA-256: e4d36a56fcadb17d96b649b3eb33b5d418ec52efd7e1c0f2e67fa4b22dfa0cf1
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting an attempt to manipulate search engine results or distribute content through a large number of seemingly benign URLs. The primary malicious URL identified is ttraff.ru, which is flagged as a redirector. The document body itself is heavily obfuscated and contains the malicious URL, further supporting the attack pattern.

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.ru/wix?keyword=the+grey+sheet+diet
    • https://cdn.shopify.com/s/files/1/0430/3791/7345/files/visipuvirikatawimu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/mojegisegoxubugo.pdf
    • https://cdn.shopify.com/s/files/1/0439/5175/1336/files/vinoziruduxafunakulufeza.pdf
    • https://cdn.shopify.com/s/files/1/0431/4297/1553/files/susokefunomala.pdf
    • https://static.usrfiles.com/ugd/b8c837_702437aa5afd4e388172c573124b41df.pdf
    • https://static.usrfiles.com/ugd/44b221_e3c1cc0aa16d450194ed45611b6bf557.pdf
    • https://static.usrfiles.com/ugd/ad2ade_86b8da8e256a49f9a3b9b849e37c079e.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5f0b8d127c7440aa11bdf2ae9256a3a.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/59774303601.pdf
    • https://cdn.shopify.com/s/files/1/0437/8558/4797/files/tufejixokapadodugoteb.pdf
    • https://static.usrfiles.com/ugd/724bd4_6c1dfda8b4a14abfa63d0dcfa58294b8.pdf
    • https://static.usrfiles.com/ugd/b8c837_b1a0654b70ed4c788273c6c4335679f8.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_off000061ab.bin
fd704965567c1f5266a4708ae982b5e2625f9d1be7da59572a9edb93b7c95ac3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61AB 4896 bytes
font_01_sfnt_off0000725b.bin
e33a1efe4651ed02758f0873e1fc35cbebd963c31ca034040c85a7c806eca003		 pdf-font-stream PDF embedded font (sfnt) at offset 0x725B 10400 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.