Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec01eed14977f306…

MALICIOUS

PDF

69.2 KB Created: 2020-08-31 09:21:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0444a48a2ee9c78b75c2b709350b4e0 SHA-1: b92a1c068eb31921680d3842462e6fe4a7abf870 SHA-256: ec01eed14977f3063c4ead81b6c798677632b0285f951e5af581b204381de0a3
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'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, many hosted on 'cdn.shopify.com'. The ML classifier also strongly flagged this PDF as malicious. The embedded URL in the document body, 'https://ttraff.com/wix?keyword=modern+environmental+science+and+engineering+spam', likely serves as the initial lure to a malicious site.

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/wix?keyword=modern+environmental+science+and+engineering+spam
    • https://cdn.shopify.com/s/files/1/0437/0645/0074/files/tipamazufaza.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12729031526.pdf
    • https://cdn.shopify.com/s/files/1/0433/6861/1989/files/75952738344.pdf
    • https://cdn.shopify.com/s/files/1/0434/8936/2082/files/cancer_de_prostata_sintomas.pdf
    • https://cdn.shopify.com/s/files/1/0434/8706/8322/files/best_presentation_powerpoint_templates_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/golden_software_grapher_4_free.pdf
    • https://cdn.shopify.com/s/files/1/0462/0084/8537/files/atheist_books_amazon.pdf
    • https://cdn.shopify.com/s/files/1/0431/1325/0965/files/17949102371.pdf
    • https://static.usrfiles.com/ugd/ae059d_db74ff70dd38464a8a1cc2a48daa4f62.pdf
    • https://static.usrfiles.com/ugd/73cb9e_853864d2c62f458f8db3337030099aa7.pdf
    • https://static.usrfiles.com/ugd/b8c837_d1cf448b6cbc46a68b31134152d4f845.pdf
    • https://static.usrfiles.com/ugd/89064d_4859f553ab014a90be51a319cfeca1be.pdf
    • https://cdn.shopify.com/s/files/1/0440/7967/7590/files/gobazuvidetazoxunodow.pdf
    • https://cdn.shopify.com/s/files/1/0434/9142/6469/files/62616010828.pdf
    • https://cdn.shopify.com/s/files/1/0431/1760/9122/files/91162048105.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_off0000c979.bin
46dbd3f63921e6ecaec92e2635b0dcc84bce15acae4f2c6986b410bdf5b08aa6
pdf-font-stream PDF embedded font (sfnt) at offset 0xC979 5460 bytes
font_01_sfnt_off0000dbfe.bin
42d5b994b883c69d80fd7a110158f4f96db7d3d51a3bb4591972d10e7c1cdf8e
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFE 13708 bytes