Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d518ddf2529413e…

MALICIOUS

PDF

60.6 KB Created: 2020-08-29 03:18:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30645b81504b5ff90f89b4497e61b9e6 SHA-1: 85c6e52983062fdac30099ede2858afcc70ca71f SHA-256: 7d518ddf2529413ed10ddd1adfba0c03f61193d540e48e9a91668c399d2665f5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.link/wix?keyword=number+49+in+the+bible', suggesting a lure to a malicious site. The presence of a large number of external links, many pointing to PDF files, indicates a link farm designed to direct 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.link/wix?keyword=number+49+in+the+bible
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_103e10f461a34d39b8cb87ee53655667.pdf
    • https://static.usrfiles.com/ugd/b8c837_285035deed82408eab1e9631be5eeee4.pdf
    • https://static.usrfiles.com/ugd/b8c837_5115728ce64343c68e1683551c93fbcf.pdf
    • https://static.usrfiles.com/ugd/b8c837_c9e96cf98bc24f16a690946c67db9de7.pdf
    • https://static.usrfiles.com/ugd/b8c837_22d96b4d38574a55803ce024e437b3e3.pdf
    • https://cdn.shopify.com/s/files/1/0430/2376/1571/files/kimobad.pdf
    • https://cdn.shopify.com/s/files/1/0431/7167/6314/files/84411664952.pdf
    • https://cdn.shopify.com/s/files/1/0435/7623/0051/files/lifuropifugukifiruzok.pdf
    • https://static.usrfiles.com/ugd/b8c837_607e5fb06bcc44f8b07ec7d86fae0efb.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ce99a55629c4b23afebda09f8cda3de.pdf
    • https://static.usrfiles.com/ugd/b8c837_3091be05b41e4d6ea2f3744bc94c4288.pdf
    • https://static.usrfiles.com/ugd/b8c837_107956d41240409694fc7b6a865564cf.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b0faf57070d4187bef536e0dec52e7e.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_off0000b299.bin
2fab19607eb155e37ec077129f24d00071c69875a9f8026b266a1a10e8750c30
pdf-font-stream PDF embedded font (sfnt) at offset 0xB299 4888 bytes
font_01_sfnt_off0000c319.bin
cff1c38ee5d9a22d10f848e2666e9a479b0c1f86257b82dbfdaecf22c334823a
pdf-font-stream PDF embedded font (sfnt) at offset 0xC319 10204 bytes