Malicious PDF — malware analysis report

Static analysis result for SHA-256 898671de2ffaeec6…

MALICIOUS

PDF

48.1 KB Created: 2020-08-30 19:32:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3528588f12782bad858940d19c6dddb SHA-1: 3837133e8771e8f43321db94f994f217ae33b79b SHA-256: 898671de2ffaeec6cc7467250c28fc14cca261355b3f1f6e8832e0c2b0f29562
150 Risk Score

Malware Insights

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

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 domain identified as a malicious redirector. The document body contains obfuscated text and a URL that likely serves as a lure or part of a link farm designed to direct users to malicious infrastructure.

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=elliot+turiel+teori
    • https://static.usrfiles.com/ugd/9d869b_583f75dcff9240b5b96148d91cc7a75e.pdf
    • https://static.usrfiles.com/ugd/ade4e6_5f5bbce5de72435a87cf227b5da6b2f7.pdf
    • https://static.usrfiles.com/ugd/b8c837_0e1df0d4c01a47d7a501a097d1c4e0b3.pdf
    • https://static.usrfiles.com/ugd/af0aa9_1cbf08b643d1438b8141e5313d3a5fd4.pdf
    • https://static.usrfiles.com/ugd/078c79_6ad790d732ee4928843593fc7111a18a.pdf
    • https://static.usrfiles.com/ugd/136d07_9e5b9930da59448e8081f875a10504c7.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_b3fd60ad9f304e2f82efea84099340aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_8e7c60119e7a47c4bb0677d44fedcb88.pdf
    • https://cdn.shopify.com/s/files/1/0434/0501/7238/files/78765941418.pdf
    • https://cdn.shopify.com/s/files/1/0434/5148/2278/files/dunubekufavekewuba.pdf
    • https://cdn.shopify.com/s/files/1/0434/1504/4245/files/dozobozoru.pdf
    • https://cdn.shopify.com/s/files/1/0431/3051/9716/files/gikiniramupubis.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_off0000818b.bin
1f436e5cf54fcc8a0584accff4628e7ebb5b255e26102ae6620347f12779a8da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x818B 4248 bytes
font_01_sfnt_off00009001.bin
98a737ea916db2deaa906b4279969d63108bb8373c5a5fc600b7834d4f97f16a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9001 10652 bytes

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