Malicious PDF — malware analysis report

Static analysis result for SHA-256 898ea1423569f68f…

MALICIOUS

PDF

61.8 KB Created: 2020-09-01 09:55:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a18f437df0db75b0b87313aa4339cdd3 SHA-1: 9073ce28d3ede11fb019d740a2e287fc6ed2b620 SHA-256: 898ea1423569f68f5bb77d4f30abc59606b1a312476a95749e42467e19aea56e
150 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, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious destination. The document body contains garbled text but includes the target URL, indicating an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=survival+sepsis+pdf
    • https://cdn.shopify.com/s/files/1/0434/0485/3402/files/nisadotarix.pdf
    • https://cdn.shopify.com/s/files/1/0436/1306/1277/files/jevobozuxupi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8325/9301/files/96417129653.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/ramizeme.pdf
    • https://cdn.shopify.com/s/files/1/0429/5062/3385/files/74204828618.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5783/files/kemenobegurenadigusuwux.pdf
    • https://cdn.shopify.com/s/files/1/0430/0177/4233/files/vatotoxorij.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/bible_college_application_form_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/9th_class_chemistry_viva_questions_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/5194/0000/files/blueberry_pie_nutrition_information.pdf
    • https://static.usrfiles.com/ugd/b8c837_0c98e0e70f5b47a8b89258136dead7be.pdf
    • https://static.usrfiles.com/ugd/cc14e4_2b12e042a04c423d87d58f7bee52dea2.pdf
    • https://static.usrfiles.com/ugd/4725f1_e1b23b79efbf4c338eabec11e424a3a7.pdf
    • https://static.usrfiles.com/ugd/b8c837_ea145b9d95fa4104aaa97b7668ab9385.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_off0000a3fb.bin
2876367f235b82987f3d52cd1dbd9ada095474e80485ff92dc5d7fe368902008		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3FB 4784 bytes
font_01_sfnt_off0000b44a.bin
6bef9ca4df1c1a110b0c509099846d0b4f102b7dded22a1f1eb27dfaf164b6f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB44A 12632 bytes
font_02_sfnt_off0000dcc3.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC3 4324 bytes

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