Malicious PDF — malware analysis report

Static analysis result for SHA-256 cec0fc055deb9fd5…

MALICIOUS

PDF

47.6 KB Created: 2020-08-18 19:43:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c0b530fb37803f1ee16422c4df898f6 SHA-1: 6dcfd94fb6a64aa3f7171680983586e60e589ac1 SHA-256: cec0fc055deb9fd5df2594a12b474b786295b2186402f7cb11e0f46af4ebff51
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to `ttraff.cc`. The document body, though partially corrupted, contains this URL and also lists numerous other URLs, many hosted on `cdn.shopify.com`, suggesting a link farm or SEO poisoning attempt. The primary malicious link is `https://ttraff.cc/pify?keyword=cambridge+english+pronouncing+dictionary+18th+edition`, which is likely intended to trick users into downloading a malicious file or visiting a phishing site.

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=cambridge+english+pronouncing+dictionary+18th+edition
    • http://files.alltechconsultinggroup.com/uploads/1/3/0/7/130739419/8217023.pdf
    • https://cdn.shopify.com/s/files/1/0448/2433/0402/files/autocad_plant_3d_tutorial_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/7763/9075/files/dowamo.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/33588370742.pdf
    • https://cdn.shopify.com/s/files/1/0430/5757/8138/files/71650748350.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/92083730122.pdf
    • https://cdn.shopify.com/s/files/1/0433/1775/6057/files/83171241899.pdf
    • https://cdn.shopify.com/s/files/1/0437/0818/6792/files/acknowledgement_receipt_of_payment.pdf
    • https://cdn.shopify.com/s/files/1/0440/9350/5688/files/nafexepoduda.pdf
    • https://cdn.shopify.com/s/files/1/0430/7098/0247/files/getijinuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/8547/1656/files/50549998967.pdf
    • https://cdn.shopify.com/s/files/1/0438/3208/2594/files/sugenog.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_off00005db7.bin
e38605d4d81916bcaec81853159f82005e521c9469602c4681967758ca679567		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB7 5880 bytes
font_01_sfnt_off00007193.bin
a230272b759e847e00035798a4a3dae468a168e3c4690b93f2abce5fca707a73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7193 12772 bytes
font_02_sfnt_off00009a74.bin
d53d347cea387c54c087b2cd85ea94373ed5f2f525a48ba1569850c62da8c160		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A74 16116 bytes

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