Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd94e37744abdc8d…

MALICIOUS

PDF

50.7 KB Created: 2020-08-24 05:06:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 740a25359d5264c2cc6c7d258e7de1d3 SHA-1: a7b94f2af307c77a0cd10f57df23e6147e79300e SHA-256: dd94e37744abdc8dfeb6eb11f668ff8ce7f1ff33bc550c16069a85002f0d46a0
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of the primary links redirects to a known malicious domain, ttraff.cc. This suggests a link farm or redirection tactic to obscure the final malicious destination. The document body, though partially corrupted, contains text related to reading comprehension passages, likely a lure to disguise 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.cc/pify?keyword=simple+reading+comprehension+passages+pdf
    • http://dezudax.icmindfulbirthing.com/uploads/1/3/1/4/131453060/0d094.pdf
    • http://files.kelownaweddingvideos.com/uploads/1/3/1/3/131383541/61dac62f5dad1b7.pdf
    • http://files.whippetclubofscotland.co.uk/uploads/1/3/1/4/131408664/e0a846.pdf
    • http://dupem.icanisciolti.com/uploads/1/3/2/7/132741555/rogopezelazaxiwukuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/8694/6206/files/cours_d_anglais_grammaire.pdf
    • https://cdn.shopify.com/s/files/1/0429/2381/9164/files/aaye_aapka_intezaar_tha_dj_song.pdf
    • https://cdn.shopify.com/s/files/1/0438/1533/8144/files/wibojupamaperefoda.pdf
    • https://cdn.shopify.com/s/files/1/0433/6690/8063/files/renagogizivixusano.pdf
    • https://cdn.shopify.com/s/files/1/0430/6042/8962/files/nobamexoni.pdf
    • https://cdn.shopify.com/s/files/1/0429/5829/1093/files/60343136776.pdf
    • https://cdn.shopify.com/s/files/1/0440/8701/7637/files/42934609353.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/44386142986.pdf
    • https://cdn.shopify.com/s/files/1/0437/5022/8119/files/vasimadovuzapuguwoxikofu.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_off0000875e.bin
38cc17a1aba05848443bb330e953c7ef018c8e7c36f2a95325bfbedf4505eaa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x875E 5672 bytes
font_01_sfnt_off00009a6c.bin
e1cb7700969b141adc9a3b79516f7f8ee7c5b6fe33b60b63d37b288f3f0e2d03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A6C 10656 bytes

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