Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3ff0bdb780a67bb…

MALICIOUS

PDF

44.7 KB Created: 2020-08-07 20:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 642fca9d973f9be304a2b3adbb610a2a SHA-1: 5b8a298caf68cd89bfcb371233fd1c55df4d190a SHA-256: c3ff0bdb780a67bbb8d45db5c93d4d1e8eee2227d3349613b227a001de81dcb5
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, https://ttraff.cc/pify?keyword=carburizing+heat+treatment+pdf. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or phishing. 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.cc/pify?keyword=carburizing+heat+treatment+pdf
    • http://files.yogawithlori.org/uploads/1/3/0/8/130814596/d6fbf49.pdf
    • http://xejejije.betheluccelkton.org/uploads/1/3/1/3/131383483/1f9929396d.pdf
    • http://nefev.mountedup.com/uploads/1/3/1/4/131409090/2616358.pdf
    • https://cdn.shopify.com/s/files/1/0434/7658/2552/files/hydrazine_msds.pdf
    • https://cdn.shopify.com/s/files/1/0434/2677/5196/files/12441868669.pdf
    • https://cdn.shopify.com/s/files/1/0439/2720/8091/files/38177980995.pdf
    • https://cdn.shopify.com/s/files/1/0437/7421/4306/files/modify_text_mac.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/26225030347.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/50214193266.pdf
    • https://cdn.shopify.com/s/files/1/0431/9127/1586/files/31149527139.pdf
    • https://cdn.shopify.com/s/files/1/0429/3961/3347/files/44069969898.pdf
    • https://cdn.shopify.com/s/files/1/0434/1281/6039/files/70448724781.pdf
    • https://cdn.shopify.com/s/files/1/0434/6534/3133/files/81163343641.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kilezibuvi.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_off000070b5.bin
488bc24e07404e56e88ee75640c508b25a4368009d8379849ced225be5d76f32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70B5 5340 bytes
font_01_sfnt_off000082bb.bin
3b157556017d6e7af6ecec8cf4310c9691d8702bb2ed619e53ad87e85214d2f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82BB 10420 bytes

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