Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a98bfed6396a101…

MALICIOUS

PDF

38.3 KB Created: 2020-09-14 09:05:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c211173951d270b55036dbbbeacc348 SHA-1: 6296113f46daef13877059ef9fc9914acbadffed SHA-256: 4a98bfed6396a1015888f46d373e2a74b337c5560a3cc3ec3bc1b8a2d7e28f93
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.me/pify?keyword=kiinde+kozii+instructions'. The document body, though heavily obfuscated, also contains this URL and appears to be a lure related to product instructions. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm intended to obscure the malicious redirector.

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.me/pify?keyword=kiinde+kozii+instructions
    • https://static.usrfiles.com/ugd/f46427_7dd4cadd9bba4b528151805da68fd208.pdf
    • https://static.usrfiles.com/ugd/7f46b5_3278a3283fe74176a3661603913852f3.pdf
    • https://static.usrfiles.com/ugd/91e123_695cbfab086f4a56b7fa2af0835edcb5.pdf
    • https://static.usrfiles.com/ugd/0e6328_cbade05221084334ba89fb650a8fd14d.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_cd40fcf378384531ae74a3a184983b3f.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/puliwaxaj.pdf
    • https://cdn.shopify.com/s/files/1/0436/5543/0309/files/64946441482.pdf
    • https://cdn.shopify.com/s/files/1/0440/0971/7910/files/73050005041.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/wuxovagerep.pdf
    • https://cdn.shopify.com/s/files/1/0429/6241/9863/files/75910819320.pdf
    • https://cdn.shopify.com/s/files/1/0437/4305/1937/files/fiturapijoxafawumele.pdf
    • https://cdn.shopify.com/s/files/1/0437/7932/6110/files/mens_70s_platform_boots_cheap.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56966684837.pdf
    • https://cdn.shopify.com/s/files/1/0440/2806/8005/files/borderliner_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/8209/5519/files/sai_nakshatra_malika_telugu.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_off0000597c.bin
51ab6f18bd4ea15e3f66d91b99e8c42439b7aefd43555543c225aadc3eaab7ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x597C 4776 bytes
font_01_sfnt_off000069d7.bin
dfb67da27515fffe56ba7f50e6d1137427da9d52ded4156ce96fa618d548fb59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69D7 10156 bytes

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