Malicious PDF — malware analysis report

Static analysis result for SHA-256 df8afb2e4cef4111…

MALICIOUS

PDF

40.4 KB Created: 2020-08-11 12:04:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ac1b35f219885f1907391e3b867180b SHA-1: 3cddf59975857e7729c4f2f2e2dd8b2529c4abae SHA-256: df8afb2e4cef4111331b75a14e6d4b1ecdbb72ef910dc9e2fb3cdbc0d07dea52
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. The primary link, however, directs to a malicious redirector at 'ttraff.cc' with a keyword suggesting it's related to IELTS test answers. This indicates a likely phishing or scam attempt, using a seemingly relevant document to trick users into visiting a malicious site. 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/wb?keyword=ielts%20trainer%20listening%20test%204%20answers%20pdf
    • http://nalavikex.happinesspodcast.net/uploads/1/3/1/3/131383483/9212030.pdf
    • http://files.veronicakedar.com/uploads/1/3/0/8/130874058/52707df064b5756.pdf
    • http://files.plasticactionuk.co.uk/uploads/1/3/1/0/131070849/4e31b1b71eae.pdf
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/pufanosatudajoxijij.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9815/files/jopakilijofe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/rakuwasugewijixoga.pdf
    • https://cdn.shopify.com/s/files/1/0431/6889/1040/files/tunugadop.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0572/files/adverbs_of_sequence_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0440/7951/3752/files/zarosalaka.pdf
    • https://cdn.shopify.com/s/files/1/0437/1854/1480/files/17513336736.pdf
    • https://cdn.shopify.com/s/files/1/0437/6687/4266/files/modifys_for_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/6815/2216/files/12950395481.pdf
    • https://cdn.shopify.com/s/files/1/0436/9580/0475/files/57880408666.pdf
    • https://cdn.shopify.com/s/files/1/0429/1375/9395/files/30464517472.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000532a.bin
2beaff6427ab4b0929cab54b127efe513e80e1d7340480c45fddda51f391acc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x532A 5004 bytes
font_01_sfnt_off00006449.bin
8cffd9fa96f1a4c499caeb599d6be58e53f72e253cccbf9eec7a870a1f0e6f66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6449 10724 bytes
font_02_sfnt_off000086b9.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86B9 4324 bytes

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