Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f33bbf40ef3dad8…

MALICIOUS

PDF

48.4 KB Created: 2020-07-31 12:59:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46c147289cd8537663ddd734020595c5 SHA-1: c79cecfab0f1be5b23468c6b662f2524633aa7b5 SHA-256: 3f33bbf40ef3dad828edec370abf3da319f3ba32344e6e5245e4d63260076396
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure via the URL https://ttraff.cc/pify?keyword=badminton+fundamental+skills+pdf. Additionally, PDF_SEO_LINK_FARM indicates the document is part of a link farm, with 17 external PDF links, many hosted on cdn.shopify.com. The document body, though heavily corrupted, suggests a lure related to 'Badminton fundamental skills pdf'. 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=badminton+fundamental+skills+pdf
    • http://files.hollistonxctf.com/uploads/1/3/0/7/130739970/mebumegivi.pdf
    • http://files.maidstonebuddhistgroup.website/uploads/1/3/1/8/131857419/9648813.pdf
    • http://files.kmaysphotography.com/uploads/1/3/1/8/131855992/412def98d78.pdf
    • http://files.pruewalkerfasd.com/uploads/1/3/1/4/131452988/4851859.pdf
    • https://cdn.shopify.com/s/files/1/0428/4514/3207/files/deminumezebewigibisu.pdf
    • https://cdn.shopify.com/s/files/1/0436/9642/3080/files/jetolovusovu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7182/2229/files/defagiwizi.pdf
    • https://cdn.shopify.com/s/files/1/0437/4259/3189/files/mivuzo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2816/9375/files/60246365968.pdf
    • https://cdn.shopify.com/s/files/1/0429/7395/4204/files/13800072858.pdf
    • https://cdn.shopify.com/s/files/1/0431/1498/7674/files/rofapoginaxijezokikeki.pdf
    • https://cdn.shopify.com/s/files/1/0429/8198/2361/files/34686879859.pdf
    • https://cdn.shopify.com/s/files/1/0435/5548/7905/files/sasovobotajaban.pdf
    • https://cdn.shopify.com/s/files/1/0432/6955/4332/files/28480558641.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7638/files/26030707298.pdf
    • https://cdn.shopify.com/s/files/1/0435/1862/3896/files/12236730561.pdf
    • https://cdn.shopify.com/s/files/1/0440/6480/0918/files/filomanaxofapux.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_off0000816d.bin
60c2c25c7c5e3c4f7b30382fb1ec582e4503a836a7111ddf75f7bde98222fc26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x816D 5084 bytes
font_01_sfnt_off000092a7.bin
c146dbe22cfdcc4e1f811a8626287a97d439f7d5e4f6c29138924e74e28152c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92A7 9796 bytes

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