Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3afa208a551f2ed…

MALICIOUS

PDF

50.3 KB Created: 2020-08-23 13:56:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bda62efe839dbb4ea4f6a77244884042 SHA-1: 53593721f2f25c45ab66ec57c8a190c9f2888dc0 SHA-256: a3afa208a551f2ed73871af9afa637655853a8ceb38f9386d682feaa1aec1f4b
150 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link and a large number of external PDF links, suggesting a link farm or phishing lure. The primary malicious URL identified is https://ttraff.cc/pify?keyword=education+blog+templates+free. While the document body contains garbled text and what appears to be metadata, the presence of the malicious redirector is the strongest indicator of malicious intent. No scripts were extracted from this sample.

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=education+blog+templates+free
    • http://files.crescentbaydollfanciers.com/uploads/1/3/2/6/132695492/aad70.pdf
    • http://files.edtechcoop.com/uploads/1/3/1/3/131398322/susobed-senana.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58143530911.pdf
    • https://cdn.shopify.com/s/files/1/0431/3258/4098/files/75854131160.pdf
    • https://cdn.shopify.com/s/files/1/0431/7249/5519/files/bosapafarafegax.pdf
    • https://cdn.shopify.com/s/files/1/0428/1466/8959/files/67599652355.pdf
    • https://cdn.shopify.com/s/files/1/0461/0975/3507/files/wound_care_management_clinical_practice_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/28269924543.pdf
    • https://cdn.shopify.com/s/files/1/0432/8993/6025/files/an_inspector_calls_characters.pdf
    • https://cdn.shopify.com/s/files/1/0433/9263/0947/files/59011508350.pdf
    • https://cdn.shopify.com/s/files/1/0440/4209/2694/files/fiwerodoni.pdf
    • https://cdn.shopify.com/s/files/1/0429/5557/1353/files/xazovedokalekulojimut.pdf
    • https://cdn.shopify.com/s/files/1/0438/7468/0987/files/negediwo.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_off00007b14.bin
2fd44753ed7074fbb5205ffd1e966218142050386f27e2e507d7f0fd161b4ad3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B14 5572 bytes
font_01_sfnt_off00008dec.bin
efc7239af84ed1bdc835fc4a7e82a0d1c5948a586c6359d163ae905a1f177d0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DEC 15056 bytes

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