Malicious PDF — malware analysis report

Static analysis result for SHA-256 962fab43fc728c37…

MALICIOUS

PDF

44.8 KB Created: 2020-08-05 01:50:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6de4f6571dc4254c0c51c2ba26d86f5f SHA-1: 608a20af7f2542580b4605754ba10776c4c7eaaa SHA-256: 962fab43fc728c37b49397bc8432800a76bfbfaa947e56c32e49f1856eb122a5
120 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector. The primary malicious link, https://ttraff.com/pify?keyword=respiratory+system+parts+and+functions+worksheet+pdf, is designed to lure the user into clicking it by appearing to be a worksheet. This link then redirects to further infrastructure, indicating a phishing or malware delivery attempt.

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.com/pify?keyword=respiratory+system+parts+and+functions+worksheet+pdf
    • http://files.mississippimudkennels.com/uploads/1/3/1/4/131410747/b60a8a.pdf
    • http://files.wordrefiner.com/uploads/1/3/0/7/130775912/pukawujo.pdf
    • http://files.saturdayandsundayonsignal.com/uploads/1/3/0/7/130739906/4230024.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2988/files/nibodilixoxalifum.pdf
    • https://cdn.shopify.com/s/files/1/0432/8125/2508/files/wokuravunavipuwodijijof.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/dibarerenufevevavi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6504/8214/files/burner_management_system.pdf
    • https://cdn.shopify.com/s/files/1/0437/5497/9477/files/pawerujonavuzizup.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9800/files/guwukokoneboxut.pdf
    • https://cdn.shopify.com/s/files/1/0428/5631/7091/files/75924300563.pdf
    • https://cdn.shopify.com/s/files/1/0437/0438/5686/files/30612443025.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7957/files/12231874838.pdf
    • https://cdn.shopify.com/s/files/1/0440/9635/6504/files/70662966804.pdf
    • https://cdn.shopify.com/s/files/1/0437/9839/7085/files/duwibigawajiledux.pdf
    • https://cdn.shopify.com/s/files/1/0434/7278/1478/files/5436219540.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_off000071be.bin
ba2130514e905898d49890cab525d0157af36ac2cbfd7a8398e04a1039ca46c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71BE 5628 bytes
font_01_sfnt_off000084da.bin
64ca09cc2c6b53ef540d161fafb4c091acab7cda642257cac2ac0040ea91dd83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84DA 9756 bytes

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