Malicious PDF — malware analysis report

Static analysis result for SHA-256 e906153f39b614ff…

MALICIOUS

PDF

40.1 KB Created: 2020-08-20 00:21:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7fb0a03bca460085346e800b251af9e SHA-1: 72d7a396a9e0a40897a09b99dccd0742c4dec555 SHA-256: e906153f39b614ff3635bb791e04e627075b5da3e3e9f4fd0ef66baab2934af0
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a free expense reimbursement form template. This link, 'https://ttraff.com/pify?keyword=free+expense+reimbursement+form+template', leads to known malicious infrastructure. The document also features a large number of external PDF links, many of which point to potentially malicious or unknown domains, suggesting a link farm or redirection strategy. No scripts were extracted, but the presence of a malicious redirector and the overall structure strongly indicate a phishing or social engineering attempt.

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.com/pify?keyword=free+expense+reimbursement+form+template
    • http://files.cachor.org/uploads/1/3/0/9/130969896/3cfa7b2e34e948.pdf
    • http://wilutavu.mrwillpe.com/uploads/1/3/1/3/131383613/wonesosemukafigewaba.pdf
    • https://cdn.shopify.com/s/files/1/0430/0495/2735/files/36834509537.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/novorubafiwani.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9499/files/conservation_of_momentum_worksheet_2.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rixozuxixewu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7346/0641/files/49957368917.pdf
    • https://cdn.shopify.com/s/files/1/0429/9345/1159/files/cancionero_de_mana_para_guitarra.pdf
    • https://cdn.shopify.com/s/files/1/0431/8144/1181/files/kujafewifabilug.pdf
    • https://cdn.shopify.com/s/files/1/0431/3828/5725/files/83323954408.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kozaw.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_off00005ee4.bin
3a8e486028a043d4eddef0f29fb4ce6a9f4729cf56c4494058e11004506d90c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE4 5208 bytes
font_01_sfnt_off00007082.bin
7e0c739e9fd089cb3089ee8254eb3c95d8242ed9b7c094e9c9e09a5e121e560b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7082 10356 bytes

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