Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e5ceadd3d999a01…

MALICIOUS

PDF

49.1 KB Created: 2020-09-10 01:59:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b14435c2897ec3ac45b4fc5f5cfb78c SHA-1: dc4049e5ab568ccad17a95c69415817408e7a875 SHA-256: 4e5ceadd3d999a01a11074b7dacaa31e2f02cd5f32541f2045946c194b6108ac
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF documents. The primary malicious URL is https://ttraff.me/wix?keyword=polarization+of+light+definition+pdf, which likely serves as a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • 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=polarization+of+light+definition+pdf
    • http://somudupu.timbstechtalk.com/uploads/1/3/1/4/131407117/5439c4.pdf
    • http://files.daltonwebly.com/uploads/1/3/2/3/132302970/woxerarowotibuk_kexowebedasifil_dizavujex.pdf
    • https://static.usrfiles.com/ugd/98e2de_89643391d6be4fdab2496002b0885d46.pdf
    • https://static.usrfiles.com/ugd/e0d0cf_c2bf77a000e342ef84c6a58ef0b08502.pdf
    • https://static.usrfiles.com/ugd/a467d2_371e7500722c4fcbb692456be8e21712.pdf
    • https://static.usrfiles.com/ugd/9f2514_da0cb78bba324bf3a2259b0499c467a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_1ede4d68659f408ab4f3a4858bdffa19.pdf
    • https://static.usrfiles.com/ugd/2ca09c_645e366d15c543d4a652b7503ba0c567.pdf
    • https://static.usrfiles.com/ugd/ade4e6_db3744ef2ecf4273bd259dd9c7833ccb.pdf
    • https://static.usrfiles.com/ugd/04e6f9_9f1571ff56d442d89ad607cddd6d7f2e.pdf
    • https://static.usrfiles.com/ugd/bf650e_fc711b2288044cff9f19963691388109.pdf
    • https://static.usrfiles.com/ugd/cf5aa9_97ccdf63d1584aeda0d50a2a6aa0c78a.pdf
    • https://static.usrfiles.com/ugd/bf0735_95e0716b76ac4e8c81ac4a38a6ad7f1c.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f03.bin
9e3ee70914b29f24ed76f9780e03502cf8765393d2829163959542a3f958fc7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F03 5176 bytes
font_01_sfnt_off000080a5.bin
e9aa93eb34de5ea56421a279e809a5e4051525b3841e635b316c424edfd1ad3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80A5 10052 bytes
font_02_sfnt_off0000a2f9.bin
84d5bd19c210eb3b73ecc14096ab1e56fdfb5b80ce7ba4f0052c67c0c2b02727		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2F9 16060 bytes

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