Malicious PDF — malware analysis report

Static analysis result for SHA-256 11fed99bf2999117…

MALICIOUS

PDF

46.6 KB Created: 2020-08-30 09:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff7f254790dd80222a1d869460613d73 SHA-1: f96fd28b2c4d256d8d88ecf17e401d909b24e95b SHA-256: 11fed99bf2999117c6cbf2642c92bd9a4a9702ddffc235ff50b86f5c56f80a9a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link to a known malicious redirector, ttraff.ru, which is likely used to host further malicious content or phishing pages. The document also functions as a link farm, containing numerous links to other PDFs, likely for SEO manipulation or to spread malicious content. The ML classifier strongly indicated maliciousness, supporting the presence of these malicious links.

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.ru/wix?keyword=cuanto+cobra+un+tramitador+procesal
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/bf650e_f00c311fdd924745ac37f1b76522aa44.pdf
    • https://static.usrfiles.com/ugd/b8c837_f869c9e6f1204f20bb41cb2ded25ac0e.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a19685ffd1140d99fbc63c84effa6a6.pdf
    • https://static.usrfiles.com/ugd/b8c837_caaba8d62c9f49278d45ca32e7757fe3.pdf
    • https://static.usrfiles.com/ugd/33a16d_942c0080e07b48f6a1136a12fea612d9.pdf
    • https://cdn.shopify.com/s/files/1/0435/9634/9602/files/blank_weekly_calendar_template_word.pdf
    • https://cdn.shopify.com/s/files/1/0430/3778/6265/files/radusitupolodek.pdf
    • https://cdn.shopify.com/s/files/1/0433/9679/2471/files/waxijugalaku.pdf
    • https://cdn.shopify.com/s/files/1/0452/5296/8609/files/17938291799.pdf
    • https://cdn.shopify.com/s/files/1/0432/8875/6374/files/92929623808.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9462/files/kuvolilibulezoxa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8572/5857/files/minority_report_book_wiki.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_off00006120.bin
a1f512e90e941fe5757d95b27860257f72639a3e52ae18466901f70041c67815
pdf-font-stream PDF embedded font (sfnt) at offset 0x6120 5264 bytes
font_01_sfnt_off000072de.bin
f189caf999753eb7aa75f31ce67c9c6fb4d5adbf4864bcd8ac254d1b47c77041
pdf-font-stream PDF embedded font (sfnt) at offset 0x72DE 11192 bytes
font_02_sfnt_off000097ca.bin
bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939
pdf-font-stream PDF embedded font (sfnt) at offset 0x97CA 16312 bytes