Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4faab5b6514f12b…

MALICIOUS

PDF

43.4 KB Created: 2020-08-30 16:58:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5c51a8ac805d5b128887154361d3fc0 SHA-1: 921af6f1c6a722c2f04133e08231be08651384ba SHA-256: b4faab5b6514f12b5df58e42325f730b274502256fee53047ddfb57642d27674
150 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text suggesting it is a worksheet, likely a lure to encourage clicking the malicious link. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, further supporting a malicious intent to distribute content or redirect users.

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=metric+conversion+worksheet+ii+answers
    • https://static.usrfiles.com/ugd/9b7d8a_9913e11f75664927a256a170d8945ea3.pdf
    • https://static.usrfiles.com/ugd/72216b_554067cf4db342c1a48725a97d7cb297.pdf
    • https://static.usrfiles.com/ugd/b8c837_86f05555b2954559b33e9eb856273b24.pdf
    • https://static.usrfiles.com/ugd/5b9a87_aca0e51adefb41e2b414847928f00392.pdf
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/sawuzudurujepagagagaloki.pdf
    • https://cdn.shopify.com/s/files/1/0432/1496/2848/files/85450981726.pdf
    • https://cdn.shopify.com/s/files/1/0429/3450/1535/files/96460189407.pdf
    • https://cdn.shopify.com/s/files/1/0434/2641/4749/files/ruregivofupitiwewet.pdf
    • https://cdn.shopify.com/s/files/1/0435/6639/9647/files/2002_ford_explorer_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/7428/9813/files/7567033631.pdf
    • https://cdn.shopify.com/s/files/1/0429/9010/8833/files/jupaxagebakijud.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1821/files/85044640251.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_off0000646c.bin
fc575631844b3cdec323fd0f08b5da7c501fc011804706a4aa15bab4f809fb3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x646C 5076 bytes
font_01_sfnt_off000075cd.bin
46e2bb18bde95f1ef6669c8e841619e38c3a903ae45432179fbc17939b34ee46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75CD 13840 bytes

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