Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea18ae70c51a4deb…

MALICIOUS

PDF

40.2 KB Created: 2020-08-29 14:32:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 952a4e438c103ffaf969c0c62034283b SHA-1: 56df69fdcaa6e287f83feea661433e5d7f86f41d SHA-256: ea18ae70c51a4deb835dc7e74f8a4c79aae596f9bbed7df8398e8cbe1995439f
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates this, and the 'PDF_SEO_LINK_FARM' heuristic suggests a large number of external links are present, likely for SEO manipulation. The primary IOC is the malicious redirector URL.

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.ru/wix?keyword=similarities+between+social+learning+theory+and+behaviourism
    • https://static.usrfiles.com/ugd/b8c837_893d777f6e184fa09d49e5c38284c2be.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f825cf65625495496c79e78b526030c.pdf
    • https://static.usrfiles.com/ugd/b8c837_a21a8a102c63441cb91f9197f9880daf.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f37ad85f8bb4804a2d9f90703fdbead.pdf
    • https://static.usrfiles.com/ugd/6240f8_5d43d0fecc0e43fbad53d54f3ca5d800.pdf
    • https://static.usrfiles.com/ugd/accd1f_ed326cca9c444f8eaa6483f9b3ac79df.pdf
    • https://static.usrfiles.com/ugd/b8c837_38511c11674340fa94f471187ca1020b.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4248/files/92379374589.pdf
    • https://cdn.shopify.com/s/files/1/0432/5461/2123/files/balifuvupopevijakokoji.pdf
    • https://cdn.shopify.com/s/files/1/0437/2883/0625/files/nigebomifanufarowin.pdf
    • https://cdn.shopify.com/s/files/1/0433/3692/5342/files/3004278851.pdf
    • https://cdn.shopify.com/s/files/1/0430/2202/4867/files/bipulebedifubom.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_off00005ecd.bin
dcc1013043e88e10d6b3eef8d56da433d4ef727a70f7194c7fe3cc4c97da920b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECD 5848 bytes
font_01_sfnt_off0000728c.bin
a04b65649076f756c67cf97aee7e0660ebd60062428ab2105be1725b7d8f2c59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x728C 9680 bytes

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