Malicious PDF — malware analysis report

Static analysis result for SHA-256 27621c6f1bdd0c5d…

MALICIOUS

PDF

34.9 KB Created: 2020-08-21 17:02:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9244567be3d3549af26dc726720a7a1a SHA-1: 14a950293b76dd564128fdc571a75784172099d7 SHA-256: 27621c6f1bdd0c5d24b03ea8181e6d1dcab3d4a07945e7864d2d03d8af525e3e
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to known malicious infrastructure. Additionally, PDF_SEO_LINK_FARM indicates a large number of external links, many hosted on Shopify. The document body, though partially corrupted, contains text related to 'traffic incident management training answers' and includes the primary malicious URL. This suggests a social engineering lure to drive traffic to a malicious site.

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.ru/pify?keyword=traffic+incident+management+training+answers
    • http://files.glitznglamonline.com/uploads/1/3/0/7/130776776/9cbd6527049.pdf
    • http://files.ejchscounseling.com/uploads/1/3/1/4/131453395/jasox.pdf
    • https://cdn.shopify.com/s/files/1/0434/1157/0838/files/19668735277.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/5162535770.pdf
    • https://cdn.shopify.com/s/files/1/0434/3139/5478/files/lepomatagazusugepozuri.pdf
    • https://cdn.shopify.com/s/files/1/0439/4139/6638/files/ejemplo_de_texto_argumentativo_sobre_las_drogas.pdf
    • https://cdn.shopify.com/s/files/1/0434/8428/3033/files/77292119862.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/fedisimegolutulumot.pdf
    • https://cdn.shopify.com/s/files/1/0437/5799/4138/files/besagulanijizaso.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1611/files/89623045255.pdf
    • https://cdn.shopify.com/s/files/1/0430/0872/1045/files/65376164609.pdf
    • https://cdn.shopify.com/s/files/1/0441/3734/9272/files/yandere_high_school_servers.pdf
    • https://cdn.shopify.com/s/files/1/0434/8038/3653/files/kandungan_bunga_telang.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37263727017.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_off00004ae5.bin
23ab2e0fec16179766b64fcd1b239fa34fc93ab8702bc9b43c8cf797bf1a034c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AE5 5348 bytes
font_01_sfnt_off00005d0c.bin
2e7f8e350a2fc40671779fbce160c4703e2448cfc7a06ff44ccfc6b0bd1831b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D0C 9840 bytes

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