Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8c08ae29be96047…

MALICIOUS

PDF

41.2 KB Created: 2020-08-04 04:11:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5505f143d3c8feeca5221fbecbc0bbaa SHA-1: d8b776bbc2bdf18e5c160af17e265323ce3712bf SHA-256: a8c08ae29be960478460cfd6e51c2675389460ab36a0dc344a5d88b0d178a01f
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it is a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=pneumatic+system+pdf'. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous embedded links to other PDFs hosted on Shopify. The document body, though heavily obfuscated, contains the same redirect URL, reinforcing the malicious intent. No scripts were extracted from this sample.

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=pneumatic+system+pdf
    • http://files.fairtradeswansea.org.uk/uploads/1/3/1/3/131398117/995100.pdf
    • http://files.louisvilleengineer.com/uploads/1/3/1/1/131164067/sewifesibomusewavara.pdf
    • http://files.acousticservices.info/uploads/1/3/1/4/131437578/sipalukonovumevo.pdf
    • http://files.coppiceandcanvas.com/uploads/1/3/1/3/131384429/250493036d99ca.pdf
    • http://files.leslielissaint.com/uploads/1/3/1/4/131438260/mowujek.pdf
    • https://cdn.shopify.com/s/files/1/0431/8547/1656/files/wegemusosabiwiralunurelob.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/43552591090.pdf
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/baxomopuwigodasegenuzez.pdf
    • https://cdn.shopify.com/s/files/1/0430/5374/4279/files/79368571967.pdf
    • https://cdn.shopify.com/s/files/1/0431/8219/4852/files/bulasuwidomotame.pdf
    • https://cdn.shopify.com/s/files/1/0448/2488/7456/files/evangelismo_urbano.pdf
    • https://cdn.shopify.com/s/files/1/0436/2056/5156/files/10619352917.pdf
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/95836001530.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7741/files/18258233370.pdf
    • https://cdn.shopify.com/s/files/1/0433/6291/0376/files/34452166071.pdf
    • https://cdn.shopify.com/s/files/1/0428/0342/9535/files/95035836644.pdf
    • https://cdn.shopify.com/s/files/1/0437/6880/7586/files/lewixupuraw.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_off0000641b.bin
388fdf10d7218783fc3b2724802c115c7d89161a3e7317d70e8ac6a57a017dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x641B 5276 bytes
font_01_sfnt_off00007608.bin
ea574bd3f7dbb9e797ef3fbb4728f696211b650b058508cc63ebe071481bd165		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7608 9996 bytes

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