Malicious PDF — malware analysis report

Static analysis result for SHA-256 41e1849f56e37f8f…

MALICIOUS

PDF

44.9 KB Created: 2020-09-10 12:01:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89e70fbec5106fed30138768b9ad7aaf SHA-1: cb39d9fb36ce9f744299eeeb72a2ab2087d12f1c SHA-256: 41e1849f56e37f8f6100e28f28f3ca568008e10ec9130fabba016c6bdde78bc1
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, includes text related to 'best book to read 2019 pdf' and the malicious URL, suggesting a social engineering lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm used to distribute malicious content.

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.club/wix?keyword=best+book+to+read+2019+pdf
    • https://cdn.shopify.com/s/files/1/0433/2313/0009/files/82404802681.pdf
    • https://cdn.shopify.com/s/files/1/0428/7728/8611/files/nenafiginuk.pdf
    • https://cdn.shopify.com/s/files/1/0447/7734/1079/files/heart_anatomy_interior_view_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/6326/9789/files/convert_base64_to_ionic.pdf
    • https://cdn.shopify.com/s/files/1/0435/5319/4133/files/equipos_de_control_de_contaminacion_atmosferica.pdf
    • https://static.usrfiles.com/ugd/defdb4_c37cf08135cb483e864525c2c5e08439.pdf
    • https://static.usrfiles.com/ugd/912de2_61e62e0a95a849479d74a5caaea901db.pdf
    • https://static.usrfiles.com/ugd/b4f0c6_4433d9a630c047f084cb60a5a09a61a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1b535e3ad7641ceab5dcd7fd233ed9f.pdf
    • https://cdn.shopify.com/s/files/1/0438/0616/3104/files/3579166360.pdf
    • https://cdn.shopify.com/s/files/1/0466/6969/3093/files/ziruzafuka.pdf
    • https://cdn.shopify.com/s/files/1/0436/9770/1017/files/8507337637.pdf
    • https://cdn.shopify.com/s/files/1/0433/4210/2679/files/24236806393.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_off0000706c.bin
e88216d09e14f023c326b66c60203f1ec1733e012928c1e97f75cdc63082ab2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x706C 5740 bytes
font_01_sfnt_off00008400.bin
ad281da22b1c4fde1766de04fbeb52cb80ab64f93f813e2a16e28c1864d3bd39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8400 10216 bytes

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