Malicious PDF — malware analysis report

Static analysis result for SHA-256 d31715a4c39fcd7d…

MALICIOUS

PDF

41.2 KB Created: 2020-08-30 02:49:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00484b28286a46159d1ca584e5eea135 SHA-1: fca81756da281e2efce58b3a518311351fc23e1a SHA-256: d31715a4c39fcd7d36af563b53e1e15b373b29c9b775e3575e92d17e028fd411
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=es+file+explorer+ftp'. This indicates an attempt to lure the user to a malicious site. The document also contains a large number of embedded links, many of which point to Shopify domains, suggesting a link farm or SEO poisoning tactic to obscure the malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

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.ru/wix?keyword=es+file+explorer+ftp
    • https://cdn.shopify.com/s/files/1/0439/0669/5320/files/rexivunevuxofane.pdf
    • https://cdn.shopify.com/s/files/1/0432/8803/5486/files/36514463588.pdf
    • https://cdn.shopify.com/s/files/1/0429/8817/5513/files/prismacolor_skin_tone_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/5883/0231/files/la_arquitectura_del_academicismo_en_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0430/3470/6083/files/nugarirumujosiz.pdf
    • https://static.usrfiles.com/ugd/aef5b7_865bce5f35f34865b0948562747c73e7.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jidaxuno.pdf
    • https://cdn.shopify.com/s/files/1/0437/0992/3481/files/23356352761.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45235944591.pdf
    • https://cdn.shopify.com/s/files/1/0438/9155/6504/files/uniforme_colegio_agustiniano_bucaramanga.pdf
    • https://static.usrfiles.com/ugd/b8c837_4364837c90e34bed80cf35080e482e5a.pdf
    • https://static.usrfiles.com/ugd/b8c837_138298d2917e4477a0b3acf8fcf8a943.pdf
    • https://static.usrfiles.com/ugd/6908d7_c09e71e1b6d542a19c7fb1a8dec86e33.pdf
    • https://static.usrfiles.com/ugd/b8c837_b832b9a38e744de4ad2ae6d6bb618ed0.pdf
    • https://static.usrfiles.com/ugd/5de1df_733ab67d45da489eb77d41e0be90f7f1.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006448.bin
a50266ea11baef2382b57227fee62e329cd861a49e178558c5b4ca8fc777b208		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6448 4712 bytes
font_01_sfnt_off00007463.bin
26250a242b2a2d95cb6737aa2ea2aea240c8e94c7920fcb7ce4e06fa54354e9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7463 10540 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.