Malicious PDF — malware analysis report

Static analysis result for SHA-256 faac93fa7e8e20d7…

MALICIOUS

PDF

39.1 KB Created: 2020-08-17 01:20:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3c5eb9f2814bae674ef7f7ea081cc27 SHA-1: fa60c79bc88c86d9ab26b35d143b8eca8afd0f07 SHA-256: faac93fa7e8e20d751d758f3a604be77f54cf17433e85bd5ce443f281ab9642a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of external PDF links, indicating a link farm. The primary malicious URL identified is ttraff.ru, which is known for redirecting to malicious content. The document body, though heavily obfuscated, contains this URL and other Shopify-hosted PDF links, suggesting a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=scholastic+lexile+guided+reading+conversion+chart
    • http://files.thunderdiscountdrug.com/uploads/1/3/2/7/132740352/7316638.pdf
    • http://gegowavo.hippiechickband.com/uploads/1/3/1/3/131398003/serovokove.pdf
    • http://feduwe.sinclair-emergence.com/uploads/1/3/0/7/130776138/4569166.pdf
    • https://cdn.shopify.com/s/files/1/0428/0408/4899/files/zupuxinukof.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5013/files/55229562013.pdf
    • https://cdn.shopify.com/s/files/1/0430/3182/2485/files/betking_betting_app.pdf
    • https://cdn.shopify.com/s/files/1/0428/7909/0855/files/danulegalogigojizadezusid.pdf
    • https://cdn.shopify.com/s/files/1/0448/6791/1842/files/chaupai_sahib_nanaksar.pdf
    • https://cdn.shopify.com/s/files/1/0434/0462/4021/files/nufom.pdf
    • https://cdn.shopify.com/s/files/1/0431/7285/5967/files/pajetefibedilasujenup.pdf
    • https://cdn.shopify.com/s/files/1/0431/5673/4109/files/57693352587.pdf
    • https://cdn.shopify.com/s/files/1/0450/2398/5828/files/artificial_intelligence_tutorial_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/0749/8647/files/45121878165.pdf
    • https://cdn.shopify.com/s/files/1/0431/9071/4532/files/88563502788.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_off00005999.bin
ce01a15282835051061dd7600748a915f528d6fc22170b6f157dd46d71abf342		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5999 5432 bytes
font_01_sfnt_off00006c07.bin
1d29d5c24da19a6753a5c81fd2fb0760a1ba61124c062f135cdf263245454385		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C07 10328 bytes

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