Malicious PDF — malware analysis report

Static analysis result for SHA-256 c564670df95ba8ad…

MALICIOUS

PDF

34.7 KB Created: 2020-08-15 09:17:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4912179317044306255e384a165b9727 SHA-1: eba12dcbcfe416fbfd987352aefaca265b05505c SHA-256: c564670df95ba8ad9a637b97c470c5b5cd5a183e112faeb7c48c5b51f5c33b18
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.com, which is disguised as an academic worksheet. The file also exhibits characteristics of a link farm, with numerous embedded links pointing to external PDFs, many hosted on Shopify. The primary malicious link is https://ttraff.com/wb?keyword=anaerobic%20and%20aerobic%20respiration%20worksheet, which likely leads to further malicious content. No scripts were extracted, but the PDF structure and embedded links strongly suggest a social engineering attack.

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/wb?keyword=anaerobic%20and%20aerobic%20respiration%20worksheet
    • http://files.winfieldepiscopal.com/uploads/1/3/2/7/132712332/45a728.pdf
    • http://danegi.rantsreviewsreflect.co.uk/uploads/1/3/0/8/130814297/ffcb55724da8.pdf
    • http://viwud.capeptso.org/uploads/1/3/1/6/131607600/5044060.pdf
    • http://files.angelaokeefe.com/uploads/1/3/1/8/131871864/3993295.pdf
    • https://cdn.shopify.com/s/files/1/0431/5355/5624/files/kuveradenesupazevuzupil.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/informe_de_calicatas.pdf
    • https://cdn.shopify.com/s/files/1/0427/4244/8295/files/popavuladuwi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1689/6159/files/properties_of_acids_and_bases_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/6119/8491/files/98771798280.pdf
    • https://cdn.shopify.com/s/files/1/0433/8630/6710/files/52096646673.pdf
    • https://cdn.shopify.com/s/files/1/0435/9582/5320/files/positive_effects_of_globalization_in_the_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/cfop_all_algorithms.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3100392900.pdf
    • https://cdn.shopify.com/s/files/1/0440/0968/5157/files/34946341491.pdf
    • https://cdn.shopify.com/s/files/1/0433/2208/1448/files/kevumudi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4765/6351/files/bozeri.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_off000049d2.bin
d28f206153068f69c0a3634233b25db18429b30fdb4f5279d8b518be5f4914fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49D2 5416 bytes
font_01_sfnt_off00005c3e.bin
09e4e260f00c82b10600d8aee0ae63f0c5bd0e5d195c0660156334cbef749372		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C3E 9812 bytes

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