Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbcfdc89da6beb28…

MALICIOUS

PDF

49.6 KB Created: 2020-07-27 09:24:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41b36cc2cf5ec833090cad96b01ed00d SHA-1: fce6857508beec0b1fdd5bfc695a3f1301ad7ee3 SHA-256: dbcfdc89da6beb28cf46b78d9a7254776435b6e526e743d79b8cf5c24857c3fc
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a significant number of external links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. The primary malicious link redirects to 'ttraff.ru', which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'autograph movie songs free', suggesting a lure to attract clicks to these links. No scripts were extracted, but the link farm and redirector heuristics strongly indicate a malicious intent to drive traffic to harmful sites.

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/pify?keyword=autograph+movie+songs+free
    • http://files.renatalynn.com/uploads/1/3/2/7/132710592/95460bc.pdf
    • http://files.ourdivecenter.com/uploads/1/3/1/4/131407135/6359097.pdf
    • http://files.kristamasonyogafitness.com/uploads/1/3/1/1/131164023/5788931.pdf
    • http://files.renatalynn.com/u
    • https://cdn.shopify.com/s/files/1/0434/2949/4936/files/sixole.pdf
    • https://cdn.shopify.com/s/files/1/0430/0318/3258/files/29247708940.pdf
    • https://cdn.shopify.com/s/files/1/0428/8105/6935/files/18006559820.pdf
    • https://cdn.shopify.com/s/files/1/0432/9200/0406/files/54742249418.pdf
    • https://cdn.shopify.com/s/files/1/0434/9417/8982/files/55891764274.pdf
    • https://cdn.shopify.com/s/files/1/0429/1641/3607/files/17104662125.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/naxezekako.pdf
    • https://cdn.shopify.com/s/files/1/0429/5219/6249/files/55694952489.pdf
    • https://cdn.shopify.com/s/files/1/0432/4291/3955/files/37794058822.pdf
    • https://cdn.shopify.com/s/files/1/0432/6984/9246/files/lunid.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_off00008241.bin
802cad4efe5ce2695f66ac4b381285912744c6c2e9d52a361cfd5b31ee9dfda9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8241 5216 bytes
font_01_sfnt_off000093e3.bin
d0c0682e46aae4aac48d680a15a2b070d73d9f44f1d3565ca86b61ede40b9415		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93E3 11676 bytes

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