Malicious PDF — malware analysis report

Static analysis result for SHA-256 0feb5adf74051529…

MALICIOUS

PDF

46.6 KB Created: 2020-08-31 05:32:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a4b215cf42ff4e47eb83287cba0b73e SHA-1: 6426ce50fac8308cc8bff08f0ceb9712bdaf4fee SHA-256: 0feb5adf7405152988e95625082fd7c254f881b0de4b07da34e86c30f6502a64
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one critical heuristic identifying it as a malicious redirector. The document body, though heavily obfuscated, contains text referencing 'Witcher 3 sunstone mirrors' and the malicious URL. The presence of numerous external PDF links suggests a link farm or SEO poisoning attempt, likely to obscure the malicious redirector.

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=witcher+3+sunstone+mirrors
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/5589/6983/files/12039105090.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6429/files/begebulivepijupadi.pdf
    • https://cdn.shopify.com/s/files/1/0428/8351/4527/files/26745477765.pdf
    • https://cdn.shopify.com/s/files/1/0429/3358/4028/files/90418038889.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gizuvesadumewagetikuxumut.pdf
    • https://cdn.shopify.com/s/files/1/0434/9113/1554/files/juxom.pdf
    • https://cdn.shopify.com/s/files/1/0429/8083/5482/files/alvaro_mutis_poemas.pdf
    • https://cdn.shopify.com/s/files/1/0434/7022/5558/files/41760116355.pdf
    • https://static.usrfiles.com/ugd/a76634_0d32080b54574cc4aab5f8d25b4022c3.pdf
    • https://static.usrfiles.com/ugd/b11f6d_6a5eaa1fc14f4b1999e6f27d749ddd4f.pdf
    • https://static.usrfiles.com/ugd/a771bd_f2c908f70ee6467082d9906c42c95b4a.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cae.bin
293cf9909234dcb25168204c802af454da78084372be56d14c57709d2487289f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAE 4856 bytes
font_01_sfnt_off00007d0b.bin
4cf929ef498158a989a18403103bc35c2daff0105691fb9ce1b5ab9cc799a384
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D0B 10224 bytes
font_02_sfnt_off00009fe6.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x9FE6 4324 bytes