Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b9470a3e490e03e…

MALICIOUS

PDF

60.0 KB Created: 2020-09-08 12:24:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b92266d43205931005a7f3790e0193b2 SHA-1: adc2242395d9b01efd53073dac31390be3285e16 SHA-256: 7b9470a3e490e03e0d9eccaf5628cf5e8b773ad863468946f65622f8c1b838f2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to other PDF files, suggesting a link farm. One of these links, 'https://ttraff.me/wix?keyword=courtois+clean+sheets+at+real+madrid', is identified as a known malicious redirector. The ML classifier also flagged this PDF as malicious with high confidence. The presence of a malicious redirector indicates an attempt to lure users to malicious content, likely as part of a phishing or malware distribution scheme.

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=courtois+clean+sheets+at+real+madrid
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/a48928_ffa88c6b347647008beb3ec04acf1408.pdf
    • https://static.usrfiles.com/ugd/b41a9a_f6ec1d5784ab420cb2f7a512c5f4b2d4.pdf
    • https://static.usrfiles.com/ugd/26481d_e543376aab57494eb3d55ad9853aca69.pdf
    • https://static.usrfiles.com/ugd/a107db_ddf8f4c51d634b1090380dc1a12dd66b.pdf
    • https://static.usrfiles.com/ugd/c20ea7_9627b2cfe8544b6198a22fa1a4683948.pdf
    • https://cdn.shopify.com/s/files/1/0434/6744/0294/files/sojafopuwolizajilaso.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/bloomberg_new_energy_outlook.pdf
    • https://cdn.shopify.com/s/files/1/0432/0870/4164/files/mexican_black_kingsnake_care_guide.pdf
    • https://static.usrfiles.com/ugd/1479de_1df9d09f45ad478db8a7e4d8daae944e.pdf
    • https://static.usrfiles.com/ugd/12dc78_7a024f09d6bc49b5aae58c18fb55623c.pdf
    • https://static.usrfiles.com/ugd/95089d_966c2c5d6d5c4739a634c9020a20188f.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_off0000ae11.bin
f335d809b97d71e955eac219e6a06c128705fbfd1510ac170cc26086019dd9f1
pdf-font-stream PDF embedded font (sfnt) at offset 0xAE11 5084 bytes
font_01_sfnt_off0000bf28.bin
05c3a59f7d80bbe52bd016b7bcaae30c894794b25e907fabdccba6884f927f3c
pdf-font-stream PDF embedded font (sfnt) at offset 0xBF28 10604 bytes