Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5e2dc917646a912…

MALICIOUS

PDF

51.2 KB Created: 2020-08-03 11:54:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7574fa1e0211de4b561fa1509c8a7ad5 SHA-1: 1771dde5d2378c0d303fc4b39316742178c49801 SHA-256: f5e2dc917646a912f3d0bce17b5998861f1b1fd66cc1e9fd20edfec8d2270a23
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing indicating a link farm pointing to a redirector service. The primary malicious URL identified is https://ttraff.ru/pify?keyword=hepatic+encephalopathy+pdf, which likely serves to obscure the ultimate destination of the attack. The document body itself is heavily obfuscated and contains embedded URLs, further supporting the malicious intent.

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.ru/pify?keyword=hepatic+encephalopathy+pdf
    • http://files.howesoundwoodcrafters.com/uploads/1/3/0/8/130814623/6742540.pdf
    • http://files.pachecoathletics.com/uploads/1/3/1/3/131381450/2415875.pdf
    • http://files.guidedexposure.com/uploads/1/3/0/8/130874317/ribere-koxekonatol-mosajaluven.pdf
    • https://cdn.shopify.com/s/files/1/0430/5652/9565/files/31392827204.pdf
    • https://cdn.shopify.com/s/files/1/0432/4517/4939/files/48923452368.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/nusupisizo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3159/2102/files/722863182.pdf
    • https://cdn.shopify.com/s/files/1/0437/7441/0901/files/22108892235.pdf
    • https://cdn.shopify.com/s/files/1/0429/5737/3589/files/dunetapiri.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4754/files/fefubavujefepupu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9721/8460/files/98679481685.pdf
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/45153581937.pdf
    • https://cdn.shopify.com/s/files/1/0439/6164/7262/files/19373551040.pdf
    • https://cdn.shopify.com/s/files/1/0434/0868/7269/files/6764318499.pdf
    • https://cdn.shopify.com/s/files/1/0437/9289/2053/files/xebofajufixi.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_off00008b1a.bin
9d1d3903bea8e26272905de7c5a435bc03eef616c26499a3fcb30983d155b149		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B1A 5032 bytes
font_01_sfnt_off00009c45.bin
f5dc791e56895c838fd2c6364da04ad7bceec46e6d3496c0715166881f7b9578		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C45 10604 bytes

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