Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc19a7ae11cb76e2…

MALICIOUS

PDF

33.4 KB Created: 2020-09-13 04:50:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f62c9bbc9402932b14a18ff9798d15c0 SHA-1: 72ef706041f2d242417ee45096143e332e13e9ad SHA-256: cc19a7ae11cb76e2a32a573f72359ae28b7eaedb1dc9b1ac19ff61581f9d6dd0
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.me'. This URL is presented within the document body, disguised as a 'Jawbone user manual'. The document also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to 'static.usrfiles.com'. The primary malicious URL is the redirector, which likely leads to further malicious content or phishing pages.

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.me/wix?keyword=jawbone+user+manual
    • https://static.usrfiles.com/ugd/ea5d7b_4e7df9bf4aef40a1b7bd95f1017f855b.pdf
    • https://static.usrfiles.com/ugd/b8c837_515eaca7ad8d4dcc94d13af5426e78b9.pdf
    • https://static.usrfiles.com/ugd/b371d9_0938a6e9e65c43e2bfb74272aa5b3b5c.pdf
    • https://static.usrfiles.com/ugd/bd5c68_bd2e89843fad41748cd0b00263ead300.pdf
    • https://static.usrfiles.com/ugd/f459ea_6f09d3136c34480db62fac120643a1a6.pdf
    • https://cdn.shopify.com/s/files/1/0440/0267/2798/files/morimasozutulitimi.pdf
    • https://cdn.shopify.com/s/files/1/0428/8865/9100/files/editing_pages.pdf
    • https://static.usrfiles.com/ugd/47b1e8_99c5dceb2a8b41e08f71ee7fd050cd7e.pdf
    • https://static.usrfiles.com/ugd/f390e7_778e46701b4046948a5529e68888c769.pdf
    • https://static.usrfiles.com/ugd/bd1fc0_4a3a62f6b00f45ae99ac286d214f472d.pdf
    • https://static.usrfiles.com/ugd/b77b08_1da6883dfeba4b34b80802837c8e1442.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_off0000433e.bin
3421cafd75c7ad9a04c002b7fb7dc19c106801512cfaef4a1f8abcb10694297b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x433E 5052 bytes
font_01_sfnt_off00005465.bin
5f6bb2c54cf077ad5f7e5ec63551ab5cd9fae9b8d2d1b97af14296d3f781879c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5465 10772 bytes

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