Malicious PDF — malware analysis report

Static analysis result for SHA-256 1327b01df21f79cc…

MALICIOUS

PDF

49.4 KB Created: 2020-08-31 02:53:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c3fd9ba716b5282d1e8a669a3465901 SHA-1: 5e3dcb8549c4c2d26be78aad64c4ea962f640195 SHA-256: 1327b01df21f79cc3c5a05d2ba8fda62169a7ebf6e80ba9d686ee8b4d1bb9d39
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.me/wix?keyword=applied+software+measurement+capers+jones+pdf', which is flagged as malicious. The presence of multiple external PDF links suggests a link farm or redirection strategy to lead 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.me/wix?keyword=applied+software+measurement+capers+jones+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/10e3af_38e2eeec00574294ab487e04457f0b87.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef403b0c606d477e9fae24e17ab10a88.pdf
    • https://static.usrfiles.com/ugd/c1de29_8b2c5c4fe6e04125aebcd757be962fa8.pdf
    • https://static.usrfiles.com/ugd/b88e3d_3021cb96722744068a8fc2600b478802.pdf
    • https://static.usrfiles.com/ugd/10a4aa_7683938a0a364335bfc2ba89ea9bcfd5.pdf
    • https://static.usrfiles.com/ugd/b8c837_517b4ec932634a7c88d540facb71d5c9.pdf
    • https://static.usrfiles.com/ugd/0dcf4b_42ca1e8192d149a49c4856ab7bd7d678.pdf
    • https://static.usrfiles.com/ugd/98e298_aa82c442e83d43c286b6648c39e3499e.pdf
    • https://static.usrfiles.com/ugd/01e791_eb0da028633b46abb3700ebf02a5df45.pdf
    • https://static.usrfiles.com/ugd/8ab72e_6a3fdda1fe974a938fe98aa0585cd4b6.pdf
    • https://static.usrfiles.com/ugd/4b7290_41280493a57b42c2b994baaf51b5956c.pdf
    • https://static.usrfiles.com/ugd/87d215_7f71df508bf245d5903dceb682dbe095.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000630d.bin
d6826d62b501015e408ebb9009038c2e048faaf0fa674466a00eaba82f60da77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x630D 5456 bytes
font_01_sfnt_off00007595.bin
d238462efebdb795d810f240908ff6ede8d9175e65adfc4f4b81f846543c3d8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7595 14432 bytes
font_02_sfnt_off0000a2dc.bin
c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2DC 16204 bytes

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