Malicious PDF — malware analysis report

Static analysis result for SHA-256 2098fe36b3e1dc19…

MALICIOUS

PDF

49.3 KB Created: 2020-08-30 16:45:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52de5f4b132c3ec1bf8cedd14c939caa SHA-1: 6d960dbbe550e0d9a0ffb31c56b7f18788243cca SHA-256: 2098fe36b3e1dc19b680c2609beb7c60f61c16504fa0ede8e315bc3eb81621ff
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, creating a link farm. One of the primary links directs to a known malicious redirector (ttraff.cc), indicating an attempt to lead the user to harmful content. The document body, though heavily obfuscated, contains the target URL and references to SEO-optimized PDFs, supporting the link farm attack pattern.

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/wix?keyword=farmacologia+del+aparato+respiratorio
    • https://cdn.shopify.com/s/files/1/0429/6769/5509/files/77846916860.pdf
    • https://cdn.shopify.com/s/files/1/0439/3605/5454/files/michael_beckwith.pdf
    • https://cdn.shopify.com/s/files/1/0432/9242/6405/files/18434980364.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2255/files/bemeset.pdf
    • https://cdn.shopify.com/s/files/1/0437/6789/0069/files/puwolo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5184/3733/files/48907107434.pdf
    • https://cdn.shopify.com/s/files/1/0463/6685/1233/files/wagubumonan.pdf
    • https://static.usrfiles.com/ugd/30e015_87f19a2333dd4cb7b0ce50bef0073151.pdf
    • https://static.usrfiles.com/ugd/e73fea_e496990cd614485595ae9cdfd4c63656.pdf
    • https://static.usrfiles.com/ugd/a31856_3f2c218bc3c745a9b6dd7c8a6b6bf766.pdf
    • https://static.usrfiles.com/ugd/7dd30d_66dd9830845043cda6f092d091fb0b63.pdf
    • https://static.usrfiles.com/ugd/7e6083_9578ac4b4c17426493a85dd8fac7df61.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4442/files/29106706022.pdf
    • https://cdn.shopify.com/s/files/1/0467/9837/3015/files/fesuwelufesapeti.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000766b.bin
1af1fdb02f150e4b7fb9ab825036f356033ef8d1f6adfeb519aebbff9637efeb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x766B 1724 bytes
font_01_sfnt_off00007ef7.bin
89e66d2f6e5463f313197ba888253786ebf8dad1b57f7923e618a94557d171ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF7 5348 bytes
font_02_sfnt_off0000910a.bin
01d7e1f68e6d61907314a7f54081fae6f8d69e5b5259356290f5553ce6001288		 pdf-font-stream PDF embedded font (sfnt) at offset 0x910A 11512 bytes

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