Malicious PDF — malware analysis report

Static analysis result for SHA-256 2973659bd0c80cee…

MALICIOUS

PDF

46.4 KB Created: 2020-08-29 09:42:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3422449b17dc321dde048a7c49b7a571 SHA-1: 2a8a8ccfbfa8a1f59bd8f192141e667b19660fd5 SHA-256: 2973659bd0c80cee4860e5a148d955a2cf858b62d42753fcac9400da283a4831
152 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by an ML classifier and contains a significant number of external links, indicating a link farm or redirection strategy. One of the embedded URLs, 'https://ttraff.cc/wix?keyword=titan%2527+s+curse+pdf', is identified as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL and other links pointing to static.usrfiles.com, suggesting a coordinated effort to lure users to potentially harmful content.

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.cc/wix?keyword=titan%2527+s+curse+pdf
    • https://static.usrfiles.com/ugd/b8c837_8a46d5b8ab294e7a97e3382c3e3bb177.pdf
    • https://static.usrfiles.com/ugd/b8c837_5af6dc5364c24ce1a528da0d279820a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_efe6cded121f4ed4939f402f8ba5a7d1.pdf
    • https://static.usrfiles.com/ugd/b8c837_82e8055f5a22495692bf1ad55f98445c.pdf
    • https://static.usrfiles.com/ugd/b8c837_0bc6a4492a024c3e8a63f388d20d6214.pdf
    • https://static.usrfiles.com/ugd/b8c837_0e7d1d0853c747a1ad25edcac3ef4490.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c7a57557ae546768cdda66454398000.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f5ae58e2d734e10b331da350aea6af8.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf703661b1b440a5b9a3181c2ce5b30c.pdf
    • https://cdn.shopify.com/s/files/1/0434/7143/7984/files/gamomebirivizogugimiredej.pdf
    • https://cdn.shopify.com/s/files/1/0428/7827/1641/files/alimony_in_florida_reform.pdf
    • https://cdn.shopify.com/s/files/1/0433/4731/2789/files/wexedazigevenebowajobefa.pdf
    • https://cdn.shopify.com/s/files/1/0432/5523/4710/files/josedotozo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/nujaba.pdf
    • https://static.usrfiles.com/ugd/b8c837_1055622cf7514a72b97882590e5e2772.pdf
    • https://static.usrfiles.com/ugd/b8c837_ced26418bf654af0bbf015a9f023ecf3.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_off000078f8.bin
bd6216d42b210b16a9e323da2c48dafbde9c8d232c6fe54fce07a105a9d99308
pdf-font-stream PDF embedded font (sfnt) at offset 0x78F8 5100 bytes
font_01_sfnt_off00008a5c.bin
01c308afec43e830822dcde82b717deeac3dd7f810f1589ca4d2e1c8d36469ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A5C 10172 bytes