Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ad0d79d16ebb2c6…

MALICIOUS

PDF

39.3 KB Created: 2020-08-15 07:41:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 872faf8ab1b0b8b0a9a41a0e751d3fec SHA-1: 60198b2c21757ccae7aa2609a4e01bbde42eb9e9 SHA-256: 8ad0d79d16ebb2c61d4cd7f45296257d004f84299701c16defca19630db07f9b
128 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious URL, disguised as a free trading card template. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of the redirector. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many pointing to Shopify, likely to improve search engine ranking for malicious content. The SE_DOWNLOAD_BUTTON heuristic suggests a lure to encourage user interaction with the malicious link.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=free+trading+card+template+printable
    • http://files.miramarmathassessment.com/uploads/1/3/1/4/131453124/9819403.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/fukujidenam.pdf
    • https://cdn.shopify.com/s/files/1/0432/2741/4696/files/73608093199.pdf
    • https://cdn.shopify.com/s/files/1/0428/5625/1555/files/75491974362.pdf
    • https://cdn.shopify.com/s/files/1/0429/9007/6057/files/25300479431.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/rivej.pdf
    • https://cdn.shopify.com/s/files/1/0433/4452/7528/files/27538396630.pdf
    • https://cdn.shopify.com/s/files/1/0428/4170/2567/files/88924892845.pdf
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/after_effect_tamil_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/4991/8374/files/38848637936.pdf
    • https://cdn.shopify.com/s/files/1/0441/0173/0456/files/kajasaxoselaw.pdf
    • https://cdn.shopify.com/s/files/1/0439/1455/9656/files/60872506762.pdf
    • https://cdn.shopify.com/s/files/1/0432/0880/2466/files/kerala_psc_omr_answer_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/43095435226.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_off00005cdd.bin
e0184d64e17993d42f2498086a684b8c55f4e361734fb929159d8c5a034f1018		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CDD 5308 bytes
font_01_sfnt_off00006ecb.bin
46974aa7ac0c7b8b0608b413a451c4708b1d1eb801dd1fdad264dc49e3535740		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECB 9836 bytes

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