Malicious PDF — malware analysis report

Static analysis result for SHA-256 865df62509b2f667…

MALICIOUS

PDF

47.4 KB Created: 2020-08-29 18:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 803afe7e9aed6725815573b4def77890 SHA-1: da102bb5fe51215d3a36855e95ceab26e03e082f SHA-256: 865df62509b2f6676978259a5f05d640b243b27631fdbf70ba4c8b5b917e5fa2
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.me/wix?keyword=educacion+bancaria+paulo+freire', which is flagged as malicious. This suggests an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

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=educacion+bancaria+paulo+freire
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_8ea233189bf04c219ac4b3a37f1225a2.pdf
    • https://static.usrfiles.com/ugd/b8c837_486f1f31eea14163a8fc8d6835a42799.pdf
    • https://static.usrfiles.com/ugd/b8c837_cec769a20d4b4e14ac8439ac311efde1.pdf
    • https://cdn.shopify.com/s/files/1/0429/6726/9532/files/funawowapozadexis.pdf
    • https://cdn.shopify.com/s/files/1/0435/8674/8579/files/rurukigawufidorexapuzisu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4244/7265/files/nuwebo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5300/6494/files/86426209791.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e31b88086104db29415b86c1fade428.pdf
    • https://static.usrfiles.com/ugd/b8c837_5706dc71ac81497597232a735f013d13.pdf
    • https://static.usrfiles.com/ugd/b8c837_0c3dfc9495ca400b83dcb32bc8c6ef24.pdf
    • https://static.usrfiles.com/ugd/b8c837_00fd662ccaa04630affd15a124454021.pdf
    • https://static.usrfiles.com/ugd/77d535_030e12cc6d114882b96be245fff9b927.pdf
    • https://static.usrfiles.com/ugd/b8c837_d468cdc5ade940afacfa9fab9c164fc4.pdf
    • https://static.usrfiles.com/ugd/b8c837_69ac3770fcc0410eac93eacff9e17f07.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_off000060aa.bin
5da9f8be5a2960d8f408d3668be0ac74fdfa3da07fd4cd06e2ecd65373056a6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60AA 5068 bytes
font_01_sfnt_off000071eb.bin
5f018374236489a7d8d2b6a9de0c2afe07277b6e749c570c38ab7aa5199282cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71EB 11164 bytes
font_02_sfnt_off00009645.bin
814af6ed012a992c32226250d6387d0998b1b61b623dbf162780ccc5ea4148f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9645 17100 bytes

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