Malicious PDF — malware analysis report

Static analysis result for SHA-256 198a08fa4715d4a0…

MALICIOUS

PDF

43.2 KB Created: 2020-09-02 00:07:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a838727b703d9ce93e54f1c561e1511e SHA-1: f23f83e072b0a388561f0847e6158e3218011b89 SHA-256: 198a08fa4715d4a03c95e4c5a0ee556cf5f12e77e1f414dea39aaff89011d28c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one identified as a malicious redirector. The document body also contains the same malicious URL and other URLs pointing to PDF files, suggesting a link farm or redirection scheme. The primary malicious link is `https://ttraff.link/wix?keyword=microsoft+word+charts+and+graphs+templates`, which is likely used to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.link/wix?keyword=microsoft+word+charts+and+graphs+templates
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5013/8784/files/4581868174.pdf
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/81324905762.pdf
    • https://cdn.shopify.com/s/files/1/0457/6641/0406/files/totilobivupituworunar.pdf
    • https://static.usrfiles.com/ugd/217b8a_8080ea38537f4129bfda086e980f2373.pdf
    • https://static.usrfiles.com/ugd/11b39a_78cad695b8134f54b3475f54d23c93a3.pdf
    • https://static.usrfiles.com/ugd/b8c837_80d8397def9e40ef804d46a9249f8fcd.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_c7ff8659bbcf47009c41f598a2df1035.pdf
    • https://static.usrfiles.com/ugd/0f5b72_94c540f2c673489a95c3fb2f5a62f732.pdf
    • https://static.usrfiles.com/ugd/b8c837_781a18d74bd84e11ba27ce68396c5e62.pdf
    • https://static.usrfiles.com/ugd/b8c837_5e117074dfaf411d888b606c2b7bed3b.pdf
    • https://cdn.shopify.com/s/files/1/0437/6041/8970/files/rikawokuv.pdf
    • https://cdn.shopify.com/s/files/1/0435/4582/1338/files/gobelojovadadozofadurifur.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000627a.bin
bccdcce97cc406d151e52107d98001c3b8a599d301022144e466ce75d605145c
pdf-font-stream PDF embedded font (sfnt) at offset 0x627A 5668 bytes
font_01_sfnt_off000075ba.bin
2d2ff43f5c75b14c1d2b64691e84a97838b9fc352cb9ea5cbceccf9c613d39b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x75BA 13680 bytes