Malicious PDF — malware analysis report

Static analysis result for SHA-256 73ee091cbcbeb7da…

MALICIOUS

PDF

43.3 KB Created: 2020-08-30 18:08:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f586f074a0c4d39084c6995140615e16 SHA-1: 5b888dbd16e05e7bfc21951fa7d0bd1fb7806b57 SHA-256: 73ee091cbcbeb7da269133fd2430b632c7af344e2e4574d16eb3d48a1f6fc285
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is ttraff.ru, which is known for redirecting users to malicious content. The document body, though heavily obfuscated, contains text related to icons and links, suggesting a lure to a link farm.

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.ru/wix?keyword=viano%25C4%258Dn%25C3%25A9+ikony+png+zadarmo
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1342/9655/files/vudexatamizene.pdf
    • https://cdn.shopify.com/s/files/1/0432/6575/3241/files/autocad_to_converter_filehippo.pdf
    • https://cdn.shopify.com/s/files/1/0435/0210/8836/files/60285172251.pdf
    • https://cdn.shopify.com/s/files/1/0429/2280/3363/files/damif.pdf
    • https://static.usrfiles.com/ugd/d01287_aacb25c6ecff4cdc962175f0b963f1ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_8f16a9b57ebd494da62320db4ad31866.pdf
    • https://static.usrfiles.com/ugd/4d6844_ddabb6766e6e4eb287dae4c39cdf285f.pdf
    • https://static.usrfiles.com/ugd/77941b_6b8b877b429c4eabbe20e1142f78f57a.pdf
    • https://static.usrfiles.com/ugd/b8c837_463de93d2f4c4289be6300a96b299f5c.pdf
    • https://static.usrfiles.com/ugd/e643da_19e1575a13e84e769c6f9d0d5ce0e455.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ea319eff5db48a3b0b40251a6ba6f08.pdf
    • https://static.usrfiles.com/ugd/9cc572_ff4b58c3c4c14706a42c772efe0686c7.pdf
    • https://static.usrfiles.com/ugd/b8c837_1424bd56622a4d56a1e2ca8feeba0a69.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ef1c7640ec44b888fef8b6112cae54d.pdf
    • https://static.usrfiles.com/ugd/b8c837_e4456692c60a4055b451d3fd7c638e29.pdf
    • https://static.usrfiles.com/ugd/b8c837_bb74d2dac3cf4cda8cec4d88f46a491c.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_off00006466.bin
e1ba8e1a6a35ebe8b2c9266b135a2958de32a9de5922a75879739d635425d9e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6466 5536 bytes
font_01_sfnt_off000076f5.bin
a2792c45257f59ce51e9240474241a11c1b386e09c7ea3202553f564b8659264
pdf-font-stream PDF embedded font (sfnt) at offset 0x76F5 13132 bytes