Malicious PDF — malware analysis report

Static analysis result for SHA-256 64a50dcd75746473…

MALICIOUS

PDF

42.3 KB Created: 2020-08-31 16:22:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd57f85493f8023149a4753e71b293e4 SHA-1: da19e3c28d07440ab0375d765bbf35193dc53fc5 SHA-256: 64a50dcd757464735e14c9efbdeb1cd88cdae67afa77496edfd2736f3e074697
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector, disguised as a software crack download. The ML classifier strongly indicates maliciousness, and the presence of numerous external links suggests an attempt to distribute malware or conduct phishing. No scripts were extracted, but the PDF structure itself is used to host 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=antares+autotune+evo++crack
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/4c1554_fa6b328c7d3c4705bd9c3c63a054e204.pdf
    • https://static.usrfiles.com/ugd/b8c837_955193f177cb47a8b3e45262bbd0bbda.pdf
    • https://static.usrfiles.com/ugd/902d29_c0fbc5eb1cda4a6498090b426556e931.pdf
    • https://static.usrfiles.com/ugd/5e8de6_5881cece9c8e4a76b1bd24a9da4984bf.pdf
    • https://static.usrfiles.com/ugd/756799_93f0ffa5cb5d49e3abd005fd953b1cde.pdf
    • https://static.usrfiles.com/ugd/cafc24_557e875a5c094578a2155107faefee36.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_cb8b8420856545d29bb73876bc144987.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_5d64db397dc1409faef8068c0e8c3471.pdf
    • https://cdn.shopify.com/s/files/1/0431/5080/3099/files/49032657273.pdf
    • https://cdn.shopify.com/s/files/1/0434/1583/0695/files/44683891330.pdf
    • https://cdn.shopify.com/s/files/1/0429/6173/1743/files/51717499614.pdf
    • https://cdn.shopify.com/s/files/1/0429/5580/0732/files/18725156248.pdf
    • https://cdn.shopify.com/s/files/1/0431/1311/9905/files/89735809335.pdf
    • https://cdn.shopify.com/s/files/1/0433/1195/6126/files/gunimibekusagumogubapafa.pdf
    • https://cdn.shopify.com/s/files/1/0440/5205/4181/files/77241158301.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_off000068f8.bin
e778a3957290c8a8b0ea7d9dea119dbc98ba0d0a780a850e8e18f48c37e9e311
pdf-font-stream PDF embedded font (sfnt) at offset 0x68F8 4876 bytes
font_01_sfnt_off000079a5.bin
effa3b12cdd49b13ed02b1325a3b75169c0bcda26620332a826b5289738d3e12
pdf-font-stream PDF embedded font (sfnt) at offset 0x79A5 10140 bytes