Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b69f4e4453c55c3…

MALICIOUS

PDF

174.0 KB Created: 2020-08-30 10:51:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d1afcba8f2f668f88d9c0cc13671d6b SHA-1: 4f72e095de60a35c3cb5d13f36657aceb95cdf39 SHA-256: 6b69f4e4453c55c3f276f46a0b37e765cf58a455faa88d64ee2c56600dd1624f
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is likely intended to lead the user to a phishing or malware distribution site. The embedded URL is disguised within the document's content, suggesting a social engineering attempt to trick the user into clicking it. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • 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.
  • 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=intermediate+accounting+chapter+15
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8423/4398/files/epidemiologia_medronho_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0434/3778/5240/files/88679499946.pdf
    • https://cdn.shopify.com/s/files/1/0429/3168/3484/files/dusaragefagut.pdf
    • https://cdn.shopify.com/s/files/1/0461/8810/1785/files/dynasty_season_2_episode_10.pdf
    • https://cdn.shopify.com/s/files/1/0452/7859/3185/files/94524743493.pdf
    • https://static.usrfiles.com/ugd/67e251_0c2871c982c54348b4edbf477ee88253.pdf
    • https://static.usrfiles.com/ugd/a2d007_7773a6c5cc4d47b0a7cf4214ec33abd9.pdf
    • https://static.usrfiles.com/ugd/b8c837_6a5e9668ea7844e390bd419b5f506d85.pdf
    • https://static.usrfiles.com/ugd/b8c837_565e142e74bb4bff947d7d6f5e03d185.pdf
    • https://static.usrfiles.com/ugd/834936_5f8d3b4cc7d34da492a3831f3299083d.pdf
    • https://static.usrfiles.com/ugd/5ed537_07971ae3499241a38f94871d66e48c47.pdf
    • https://static.usrfiles.com/ugd/b8c837_b72dee6326534a7fa73e2601425d7c25.pdf
    • https://static.usrfiles.com/ugd/3eed2b_a60000575f764aad9951f77c49609f92.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5d37feffc15469badd09f3a45dd958d.pdf
    • https://static.usrfiles.com/ugd/b8c837_5b935660bb4b41b0a56ed5f44f4834f7.pdf
    • https://static.usrfiles.com/ugd/735189_4bbae5e06a7d4499a1fc9caead057f1f.pdf
    • https://static.usrfiles.com/ugd/ce14f3_e7595895e55c441a940a53fa04276a1c.pdf
    • https://static.usrfiles.com/ugd/b8c837_2ec284379e554faf84c97e216abefd89.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002572b.bin
c84ae012b5a1bfb9c9a1dc32dde9799e5f672c2e1dc22fd5ccf2f259e708cb36
pdf-font-stream PDF embedded font (sfnt) at offset 0x2572B 4180 bytes
font_01_sfnt_off00026358.bin
7258005d34aaffacd56bf5a36233c813b42a24d9c51775c4a66e445670a18ba1
pdf-font-stream PDF embedded font (sfnt) at offset 0x26358 5392 bytes
font_02_sfnt_off0002757b.bin
1f21288b4e8fa09c10fbc3470fda1d6c4f7dfc8d47fa1fcf3bc3fd818c0fa641
pdf-font-stream PDF embedded font (sfnt) at offset 0x2757B 16800 bytes