Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1202fbf2a42e403…

MALICIOUS

PDF

33.7 KB Created: 2020-08-31 05:20:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 975b9281d8ef5b6ff036f22c11ab7c1c SHA-1: 78002ee14caf89b9f70dc52720bda839b9bb4bcd SHA-256: d1202fbf2a42e403a1a1547468aa6c9ce132018053dfdccc48a3f00aa9f9c010
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, likely for SEO manipulation or to host further malicious content. The ML classifier strongly supports the malicious verdict.

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.com/wix?keyword=the+language+of+medicine+9th+edition+pdf
    • https://cdn.shopify.com/s/files/1/0433/8368/5270/files/71233801288.pdf
    • https://cdn.shopify.com/s/files/1/0432/6444/2521/files/webajejiguzakurekit.pdf
    • https://cdn.shopify.com/s/files/1/0433/9659/5868/files/bessel_s_inequality_in_functional_analysis.pdf
    • https://static.usrfiles.com/ugd/3be3a7_dec66fb459744ef4b02a339a7f7d9dda.pdf
    • https://static.usrfiles.com/ugd/0e9fc2_47be702ec2414a6db192b2f4afe74589.pdf
    • https://static.usrfiles.com/ugd/c068f8_572caef8e6cd47be9ddbb8745d084f4d.pdf
    • https://cdn.shopify.com/s/files/1/0437/8548/6485/files/33182591038.pdf
    • https://cdn.shopify.com/s/files/1/0431/0758/2106/files/97401578766.pdf
    • https://cdn.shopify.com/s/files/1/0431/8419/3696/files/9450451843.pdf
    • https://static.usrfiles.com/ugd/87a178_7c8c8ff9dabf4a5c9be3d5c7321675a3.pdf
    • https://static.usrfiles.com/ugd/735189_41538ed093d84945988661e2f739d20b.pdf
    • https://static.usrfiles.com/ugd/b8c837_8efc84ac797149e7b103bb65430a3f90.pdf
    • https://static.usrfiles.com/ugd/99afdc_e4d39826179041c39c5427ae6717497b.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_off0000475c.bin
87f0223e3b16a11a1a049b9347db9ff1fe47c1ae79f065c754bec40062589d42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x475C 5400 bytes
font_01_sfnt_off00005998.bin
30d4701694ad2d49ba7fd994af8b9b45474069107b2b8bbedf65509dd025a7fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5998 9608 bytes

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