Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb932b86508e5d9c…

MALICIOUS

PDF

43.0 KB Created: 2020-08-08 01:04:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e43ebebcb84ae5e7ffb5baad6f97b5fb SHA-1: 5f9c2eefaa23d3c42f62fec2d909c0839e219562 SHA-256: cb932b86508e5d9ce4f60ba38a05b2681d8bd88d0a1dec6c863289d97ae13f53
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is presented within the document body, disguised as information about '4d printing technology'. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be luring the user to a malicious site via the embedded link.

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.com/pify?keyword=4d+printing+technology+pdf
    • http://botoru.solidstatecircus.com.au/uploads/1/3/0/8/130874359/rewufi-rajixemiz-robesipalil.pdf
    • http://files.quickcleaner.co.uk/uploads/1/3/0/7/130775145/420445.pdf
    • http://files.medievalwomen.org/uploads/1/3/1/4/131452783/4982134.pdf
    • https://cdn.shopify.com/s/files/1/0428/1594/6911/files/37949270495.pdf
    • https://cdn.shopify.com/s/files/1/0429/3197/8403/files/22606839390.pdf
    • https://cdn.shopify.com/s/files/1/0436/1089/8595/files/tazurowavuzegatifufutin.pdf
    • https://cdn.shopify.com/s/files/1/0432/7401/0782/files/63851647530.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefopevepal.pdf
    • https://cdn.shopify.com/s/files/1/0433/7382/2102/files/axially_loaded_column.pdf
    • https://cdn.shopify.com/s/files/1/0431/7013/6230/files/jabukal.pdf
    • https://cdn.shopify.com/s/files/1/0440/7522/1142/files/33319700147.pdf
    • https://cdn.shopify.com/s/files/1/0434/8100/6246/files/correlation_in_python.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/mubovanawisiwujotipipi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7372/4825/files/bawutofofiwolorakutazik.pdf
    • https://cdn.shopify.com/s/files/1/0430/0416/6297/files/allahabad_high_court_aro_result.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/
    • https://cdn.shopify.com/s/files/1/0431/7013/6230/files/jab

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a66.bin
61fd103786e80d5d3ed8cae265b39feedde88d2d9bf4fb35d408976948497977
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A66 5124 bytes
font_01_sfnt_off00007be8.bin
3c95e2b450795c6779e84c0b21dfa87dd49c87af0c85ab9bf5ef150b0a8292c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE8 10192 bytes