Malicious PDF — malware analysis report

Static analysis result for SHA-256 484336b1d96e34f8…

MALICIOUS

PDF

42.5 KB Created: 2020-08-29 23:57:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06223b0d58a4e9e61612766b579b3a5f SHA-1: 1b2c1b1833470b398352f83b1679ae47a032fd45 SHA-256: 484336b1d96e34f8dd77c6354dcb5ef44db03740c6a90da8ccbf6613c506773d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a mass of external links, suggesting a link farm or SEO poisoning attempt. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of this PDF. The primary malicious IOC is the redirector URL, which is likely used to serve further malicious content or phishing pages.

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=dale+carnegie+public+speaking+pdf
    • https://static.usrfiles.com/ugd/0c41e7_ce3a4eb153234435ab225dd60740c3e7.pdf
    • https://static.usrfiles.com/ugd/277b62_7f4e3cb36bf04dc9befdfc79c71ad435.pdf
    • https://static.usrfiles.com/ugd/5899d5_a27b3064ccda478d90ef8a44bcfbafe5.pdf
    • https://static.usrfiles.com/ugd/5360f8_1609ee9f39634e65a12535a95b3a253f.pdf
    • https://static.usrfiles.com/ugd/b8c837_1b71d75ab8ef4596b2a344b295b1484e.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c2ee0dedd6a448a91324ba382142939.pdf
    • https://static.usrfiles.com/ugd/409ca8_7bfd0559205840d5853683233bac120e.pdf
    • https://static.usrfiles.com/ugd/a467d2_eb1445d6421a4ce2b7aefa6f772baa19.pdf
    • https://static.usrfiles.com/ugd/b8c837_f123701d040f4e1290fc6ee77226c2f6.pdf
    • https://static.usrfiles.com/ugd/2ac701_b33b7001785c4188865fc133a8360325.pdf
    • https://static.usrfiles.com/ugd/49be48_549ba920658e4e67b5377efaeaf08f4c.pdf
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/56838354873.pdf
    • https://cdn.shopify.com/s/files/1/0433/9059/9319/files/revista_arqueologia_mexicana.pdf
    • https://cdn.shopify.com/s/files/1/0434/5895/3369/files/58281314837.pdf
    • https://cdn.shopify.com/s/files/1/0427/6014/3014/files/mathematical_methods_for_physicists_arfken_download.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_off00006744.bin
5df4c99be822148bbe74b48ea3a158d1159d340a2ae5a55a8430fb76dd9a1f1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6744 5524 bytes
font_01_sfnt_off00007a14.bin
22c3d3e4589aeb67a1577f5aeac2cd68202a3c19804dae190fb5b7c65c10a859		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A14 10420 bytes

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