Malicious PDF — malware analysis report

Static analysis result for SHA-256 4425e310dbcab151…

MALICIOUS

PDF

38.3 KB Created: 2020-08-25 21:20:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b25a72dc4a25567501a25458d7f2b35a SHA-1: 000f2e3fc33035d6b56e759752f50901fa39a569 SHA-256: 4425e310dbcab151fc60b1bef686371c8d67d0f3e3ad38915eda3b5e7b3bf9f6
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One prominent link, 'https://ttraff.cc/pify?keyword=land+rover+defender+for+sale+texas', is flagged as a malicious redirector. The document body, though partially corrupted, includes keywords related to car sales, suggesting a lure to entice clicks. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=land+rover+defender+for+sale+texas
    • http://romuje.ugranitesandcabinetsmore.com/uploads/1/3/1/4/131437940/1339597.pdf
    • https://cdn.shopify.com/s/files/1/0428/7250/4483/files/guluj.pdf
    • https://cdn.shopify.com/s/files/1/0430/3260/8921/files/kojitekefowa.pdf
    • https://cdn.shopify.com/s/files/1/0436/3314/8062/files/carbon_nanotubes_review_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0459/9231/2991/files/play_casino_games_without_ing.pdf
    • https://cdn.shopify.com/s/files/1/0432/1175/1579/files/12930437562.pdf
    • https://cdn.shopify.com/s/files/1/0434/5724/9430/files/job_analysis_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0433/5874/8837/files/82307789038.pdf
    • https://cdn.shopify.com/s/files/1/0430/7940/1634/files/ssbu_tournament_legal_stages.pdf
    • https://cdn.shopify.com/s/files/1/0440/5588/8022/files/european_journal_of_haematology_case_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/6019/9573/files/haunted_mine_rs3.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_off000057e5.bin
d8380c70dd3c40b8f0a225de439488d32d81172a13062b1a30961db921950c1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57E5 4972 bytes
font_01_sfnt_off000068e6.bin
b836d1940ddb39b76eab1816a2a3419f60678ae6347ca2293db298acf74ce3c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68E6 10572 bytes

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