Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea64d30a5635406…

MALICIOUS

PDF

47.0 KB Created: 2020-08-01 10:53:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44658299310f3f0357bb321e12e90738 SHA-1: 7e67b65afb567c596f1606969d5196b50547405b SHA-256: 0ea64d30a563540698da22abc82ccc8ea81beaa562eb41b893e5bd6518b284da
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to further malicious content. The document also contains a large number of links to PDFs hosted on Shopify, likely as part of a link farm to improve SEO for malicious content. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs confirms the intent to redirect the user.

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/pify?keyword=how+to+initialize+an+arraylist+in+java
    • http://files.soultouchtherapies.com/uploads/1/3/1/8/131856306/c327f0a657.pdf
    • http://files.resenviecon.org/uploads/1/3/0/7/130740231/rufiziv-monuvajufas.pdf
    • http://files.abiwright.co.uk/uploads/1/3/0/8/130874278/bokejotirefe_tuboriduxi_rutosimibijab_jiwovop.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3902/3526/files/35086341977.pdf
    • https://cdn.shopify.com/s/files/1/0430/3349/3658/files/viwibigixebimigi.pdf
    • https://cdn.shopify.com/s/files/1/0440/2987/0230/files/28782882968.pdf
    • https://cdn.shopify.com/s/files/1/0437/5855/1189/files/denuloveso.pdf
    • https://cdn.shopify.com/s/files/1/0432/0470/6464/files/96545089806.pdf
    • https://cdn.shopify.com/s/files/1/0434/5410/3713/files/gusebivusepokixuvomu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2278/6466/files/bolozetuwabiworemilil.pdf
    • https://cdn.shopify.com/s/files/1/0428/0346/2303/files/telekugemozifuduz.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/microsoft_windows_search_protocol_host.pdf
    • https://cdn.shopify.com/s/files/1/0428/0667/3574/files/19769176309.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_off00006ecf.bin
17f34a9970cb5041968af27521f5d0013612bf39f196ca5b3fd8203d8f4b45e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECF 5020 bytes
font_01_sfnt_off00008011.bin
b92ddcae5f53d028ef7f5d545c494fe345f1e75daa4b96451c307701fb61e423
pdf-font-stream PDF embedded font (sfnt) at offset 0x8011 14900 bytes