Malicious PDF — malware analysis report

Static analysis result for SHA-256 928dff651235fb96…

MALICIOUS

PDF

43.6 KB Created: 2020-08-30 11:57:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3499f852bcf12b2f85a790d8c61f7d62 SHA-1: 7ee6324b594c951b06ba89fd7f0a74931ae1b2f0 SHA-256: 928dff651235fb962fbc59aa29917ef04f3ed47ab8f89d3e3b891863c1610dc9
152 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to a domain known for redirecting to malicious content. The primary malicious URL identified is https://ttraff.com/wix?keyword=samsung+syncmaster+p2770. The document body appears to be obfuscated or corrupted, but the presence of numerous links to static.usrfiles.com suggests a link farm or SEO poisoning tactic to distribute malicious 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.com/wix?keyword=samsung+syncmaster+p2770
    • https://static.usrfiles.com/ugd/a382ee_694ace722e4e45ed91c20c909e8421fa.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ea319eff5db48a3b0b40251a6ba6f08.pdf
    • https://static.usrfiles.com/ugd/162fe6_a84cd2f899d0446dbd25b100acfeaf82.pdf
    • https://static.usrfiles.com/ugd/b4609a_762a2e6c657e4e6d9518419d527d6771.pdf
    • https://static.usrfiles.com/ugd/136d07_83a9e95c841c484fbfbf95d17a07a351.pdf
    • https://static.usrfiles.com/ugd/b8c837_8a46d5b8ab294e7a97e3382c3e3bb177.pdf
    • https://static.usrfiles.com/ugd/d99ef3_df6f6518950c4e6c975b4500d60978ff.pdf
    • https://static.usrfiles.com/ugd/b8c837_a8679ef925f6435684dc6b9c5758c7d9.pdf
    • https://static.usrfiles.com/ugd/1849a1_01a4367dddc64842b4ee5c91660c755c.pdf
    • https://static.usrfiles.com/ugd/66c878_930d20a4f3e641878907ac206c768e36.pdf
    • https://static.usrfiles.com/ugd/b3bc21_72515334235548caa6798b9bea3d3e8b.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_off00006912.bin
9e2d46bddabbc9e613a6cd870b9afa7089fd2094bef315a4a2d6d653bcf5b85b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6912 5780 bytes
font_01_sfnt_off00007cb8.bin
eed982f51ab7ad660089763438ebf57dc6406c129503ebef7492f1c8425f1057		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB8 11292 bytes

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