Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd04bf9fba535faa…

MALICIOUS

PDF

59.8 KB Created: 2020-08-13 16:56:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 587bf1b162a88c41fbbf23953021dfa6 SHA-1: f4ecd9f8e996f598517451b409ba9708b85d899f SHA-256: bd04bf9fba535faa3240a8c51d3f95ab4568683aabbac70e0b2e2ebc5e9f742c
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to 'sources of revenue in nigeria pdf'. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a phishing or redirection attempt. No scripts were extracted from this sample.

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=sources%20of%20revenue%20in%20nigeria%20pdf
    • http://files.egnicksdtp.com/uploads/1/3/0/7/130775431/9363911.pdf
    • http://files.monika-schnitzer.com/uploads/1/3/1/4/131452959/zabadebavodesawona.pdf
    • http://files.markpaintspets.com/uploads/1/3/1/4/131407493/mekazimitejirip_naduku_guzinufip.pdf
    • https://cdn.shopify.com/s/files/1/0431/6515/5487/files/nuwasolizubakujesex.pdf
    • https://cdn.shopify.com/s/files/1/0443/9313/6294/files/biology_book_for_class_10th_punjab_board.pdf
    • https://cdn.shopify.com/s/files/1/0431/0099/5741/files/vivogupoluwozonopoku.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/55853960750.pdf
    • https://cdn.shopify.com/s/files/1/0437/1221/7241/files/23420219601.pdf
    • https://cdn.shopify.com/s/files/1/0432/7076/6750/files/voritawala.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/alter_ego_plus_b1_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/9179/6902/files/que_es_tecnologia_educativa.pdf
    • https://cdn.shopify.com/s/files/1/0440/5464/2853/files/64342906583.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/deved.pdf
    • https://cdn.shopify.com/s/files/1/0438/0334/5053/files/anatomia_cavidade_nasal.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9430/files/43266217897.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_off0000a5a9.bin
09cc9eb88561e2bd4f446359987d0ebb33280ec90ca60f47fa9c4286d5a60d8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5A9 5452 bytes
font_01_sfnt_off0000b845.bin
89711da23afa83839585016abdd006e3c0b07b47c8a04a7ca27be926cc25d7e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB845 12140 bytes

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