Malicious PDF — malware analysis report

Static analysis result for SHA-256 541eea87244e746c…

MALICIOUS

PDF

39.0 KB Created: 2020-09-01 11:34:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b61a3dac6ccd0eff9e9ad3fb102bbb7 SHA-1: a45e08bcf0a9a50a2343dc9fddc0923086f65d47 SHA-256: 541eea87244e746c3e31a2a33a886c32d5f493295042f9e0c79e84f2774a9005
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identified a link to 'ttraff.com' which is known for malicious redirection. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, likely for SEO manipulation or to host further malicious content. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of this PDF.

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/pify?keyword=insulated+concrete+form+home+construction
    • https://cdn.shopify.com/s/files/1/0427/9736/7452/files/xamugojoduxud.pdf
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/90636236491.pdf
    • https://cdn.shopify.com/s/files/1/0432/3078/9800/files/47546643706.pdf
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/jefilotaximolafoxad.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/60639428100.pdf
    • https://cdn.shopify.com/s/files/1/0440/5110/3894/files/pipag.pdf
    • https://cdn.shopify.com/s/files/1/0461/7489/6281/files/koxasemilip.pdf
    • https://static.usrfiles.com/ugd/b88e3d_42f12f905a6f416182348af189d8b511.pdf
    • https://static.usrfiles.com/ugd/6cf392_90df1661d9fb4b3b8e8f404168194175.pdf
    • https://static.usrfiles.com/ugd/0df15e_55c4bd142084402c84348e00a4ccfa22.pdf
    • https://cdn.shopify.com/s/files/1/0449/2414/1735/files/dubumiderisopatefojed.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/90197150211.pdf
    • https://cdn.shopify.com/s/files/1/0440/0542/5310/files/70258756668.pdf
    • https://cdn.shopify.com/s/files/1/0434/0023/3112/files/arrested_caries.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_off00005946.bin
3997530ddbddd0146c12ab00e6fe4375333642b06c81851149217526011df4c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5946 5196 bytes
font_01_sfnt_off00006ac6.bin
e865f94e1f3313a3446b79a44d660a43c84b95e2c0102e2cae79a90c0192ee47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC6 10692 bytes

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