Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d154cc526b9b9db…

MALICIOUS

PDF

43.3 KB Created: 2020-08-29 04:10:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b64a20900ea7ca1798e6a4d113e290f8 SHA-1: 564fdb6e30125952bac73f720fe3b5afccd75c74 SHA-256: 6d154cc526b9b9db241b1837940d8876e7e96e087669b1b613851672d57e4963
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to a known malicious redirector at 'https://ttraff.com/wix?keyword=sony+cyber-shot+dsc-hx90+manual'. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to a malicious site. The presence of a link farm heuristic indicates a likely attempt to manipulate search engine results or distribute malicious content through a large number of seemingly legitimate links.

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=sony+cyber-shot+dsc-hx90+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_16d77500cd1d46fa8b209575995d7c32.pdf
    • https://static.usrfiles.com/ugd/b8c837_2df6c566e62b470cab6cedf5e051cdec.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a9a94e16e1245bf9f198ea971a5db30.pdf
    • https://static.usrfiles.com/ugd/b8c837_58416f673d194866acf20d68800139f1.pdf
    • https://static.usrfiles.com/ugd/b8c837_df04a3c7bfc34e81a87a5fd656363619.pdf
    • https://cdn.shopify.com/s/files/1/0440/1928/6174/files/fitbit_charge_hr_2_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9444/files/fundamentals_of_physics_6th_edition.pdf
    • https://static.usrfiles.com/ugd/b8c837_8a102dd05cd640c09c166b36a8101432.pdf
    • https://static.usrfiles.com/ugd/b8c837_a77879a7154a429ea2864c0a27cbb4d1.pdf
    • https://static.usrfiles.com/ugd/b8c837_f2b984684e19463bbebc5fe16280df38.pdf
    • https://static.usrfiles.com/ugd/b8c837_c8b5fbe519dd4d489f77557477427c74.pdf
    • https://static.usrfiles.com/ugd/b8c837_80d801aaee1948f588f258b845f024c8.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_off0000685b.bin
6be798923e51101fcb361209fd394256a55d8453d0b9ab14f08bda5423bfde8f
pdf-font-stream PDF embedded font (sfnt) at offset 0x685B 5924 bytes
font_01_sfnt_off00007c54.bin
41cd92817059d30fc1cc83e2c0941dd9234b07c521290be65fceaaea8091a55f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C54 10620 bytes