Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4efeb9f60dcaea6…

MALICIOUS

PDF

47.0 KB Created: 2020-08-15 02:19:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f7a072e5fcc76f5f7496649729e42f2 SHA-1: 07360c25569741933b55f1b06e8f197af284271e SHA-256: e4efeb9f60dcaea6e529af9b448a2d10442221b0cbfc60538645a22f235fd24d
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a large number of embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic flagged a link to a known malicious redirector infrastructure at 'ttraff.com'. Another heuristic identified a PDF link farm with 26 external links, many hosted on Shopify. The document body contains obfuscated text and the primary malicious URL.

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=best+hydrogel+sheet+mask
    • http://doven.aspectsofdance.ca/uploads/1/3/1/8/131856772/xebosabisutisixuta.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/british_admiralty_charts.pdf
    • https://cdn.shopify.com/s/files/1/0430/7048/8730/files/wugobudalavi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1064/files/50952634479.pdf
    • https://cdn.shopify.com/s/files/1/0433/5514/4347/files/explain_current_healthy_eating_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0432/0821/2638/files/zepebidobasuxajid.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4702/files/bulawayo_polytechnic_2020_intake.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nemubowakupupoda.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kefemomorevogik.pdf
    • https://cdn.shopify.com/s/files/1/0431/6944/8097/files/zepepuwalujit.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5258/files/ziluseneluzesasokogakaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/85206300881.pdf
    • https://cdn.shopify.com/s/files/1/0435/8694/5187/files/17831267733.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_off0000774b.bin
61fe4feddc9a830452acbb904e95589516ff76110e236ba25b40853bea4ad767		 pdf-font-stream PDF embedded font (sfnt) at offset 0x774B 5456 bytes
font_01_sfnt_off000089b9.bin
6f2572440002c3636fc099ce6d19c53857b1d2a827bef0dd9e0883b85418097b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89B9 11096 bytes

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