Malicious PDF — malware analysis report

Static analysis result for SHA-256 cac59c851105b77c…

MALICIOUS

PDF

39.9 KB Created: 2020-08-23 16:23:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62854dd63f33e1fa9c6fa0b24b389c41 SHA-1: 29a415d919d2dff37c74826c017ecc0f0babfbcf SHA-256: cac59c851105b77c1a074bee45df6a9e2a2687accad6ff4e8f574e0511733253
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=percentage+of+amount+without+calculator+worksheet'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though partially corrupted, contains text related to a 'worksheet' and the malicious URL, suggesting a lure. 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=percentage+of+amount+without+calculator+worksheet
    • http://jamov.raeleensfancyfaces.com.au/uploads/1/3/0/8/130874429/rofej-roxebesikapefu-gewizewapes-xizigivep.pdf
    • https://cdn.shopify.com/s/files/1/0432/5962/5627/files/28422734107.pdf
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/21461265333.pdf
    • https://cdn.shopify.com/s/files/1/0428/2938/1791/files/70306254711.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7904/files/71208541331.pdf
    • https://cdn.shopify.com/s/files/1/0428/9898/1030/files/meta_and_link_tags.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/kusomalunomivumasalaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/3686/0839/files/vufudiwi.pdf
    • https://cdn.shopify.com/s/files/1/0440/8305/2696/files/fijaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pegumi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7258/5881/files/fish_locomotion.pdf
    • https://cdn.shopify.com/s/files/1/0448/1158/3645/files/damoxapiro.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/buluromelanusef.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_off00005c9c.bin
9b94f662748d473ff3a078f06945c6d76e1bfc0b86b102a0f03eee055796de7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C9C 5452 bytes
font_01_sfnt_off00006f08.bin
56ab63cac7b9545f1550d9a779f88354ec0a37c33946655f34c786353a5bca36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F08 10236 bytes

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