Malicious PDF — malware analysis report

Static analysis result for SHA-256 10399b915fef33e5…

MALICIOUS

PDF

47.5 KB Created: 2020-08-30 10:38:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ada74e6c442d2b25fddc280aed07827 SHA-1: 85a07d8bb0ac408d2beabd4ebd39cf5c970095ae SHA-256: 10399b915fef33e5176922321bc3aa5c7b2b17f91a167f09521213cc12d1b1fd
154 Risk Score

Malware Insights

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

The PDF file contains embedded links, one of which, 'https://ttraff.cc/wix?keyword=indian+restaurant+pdf+menu', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to an 'Indian restaurant pdf menu'. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic. The ML classifier strongly indicates maliciousness.

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.cc/wix?keyword=indian+restaurant+pdf+menu
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3636/0351/files/autocad_file_to_converter_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6900/files/histologie_de_l_appareil_gnital_masculin.pdf
    • https://cdn.shopify.com/s/files/1/0434/4106/2040/files/sefetetikamipezusalolowo.pdf
    • https://cdn.shopify.com/s/files/1/0459/6213/3663/files/arcgis_enterprise_10._5.pdf
    • https://static.usrfiles.com/ugd/ca300b_82787f3621d74dbaab4442f8784c26df.pdf
    • https://static.usrfiles.com/ugd/83b1b3_7b3efff2fe2349f38828e5628054a61f.pdf
    • https://static.usrfiles.com/ugd/10b11f_9d8a49d55d2c440e90597e06b94dbef9.pdf
    • https://static.usrfiles.com/ugd/3aee12_8eba88948c6849b8b2b6ee84cadac134.pdf
    • https://static.usrfiles.com/ugd/f46427_9ec18f8827484c5cb492cf4489cbc8fb.pdf
    • https://static.usrfiles.com/ugd/a1fb72_252cee7a268742f9a1c8c234d63bafdf.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_edb22cafbdeb47f0b8df706847782c3a.pdf
    • https://static.usrfiles.com/ugd/accd1f_c14d34d96ef94e649bf6f99414f6f955.pdf
    • https://static.usrfiles.com/ugd/b8c837_76443480bbf3494984007c5acb6a9850.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d7b.bin
2e921b71b2580b87fd701242c1213c1a97fb058dd3ac288f64e37413e1768f54
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D7B 5092 bytes
font_01_sfnt_off00008eb1.bin
fa8f7475438758b62c110d9bb27528be232a6efeb2d1175b2afcca151966f940
pdf-font-stream PDF embedded font (sfnt) at offset 0x8EB1 10180 bytes