Malicious PDF — malware analysis report

Static analysis result for SHA-256 4032b758345ac16f…

MALICIOUS

PDF

43.5 KB Created: 2020-08-14 02:19:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e27446fb3fa4acb6274af9313e4101f SHA-1: 7c952d4faae4e4f1d510c721207ba80155a9014e SHA-256: 4032b758345ac16fe8bb7c7d24a7731b7d56d64faf6725fe156d688cd00636fe
140 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body text. This link, 'https://ttraff.cc/pify?keyword=whatsapp+for+pc+windows+8.+1', is designed to lure users into clicking it under the pretext of downloading WhatsApp. The document also contains a large number of embedded links to external PDFs, many hosted on Shopify, which is flagged as a link farm. No scripts were extracted from this sample.

Heuristics 4

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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.cc/pify?keyword=whatsapp+for+pc+windows+8.+1
    • http://files.johnreesleather.com/uploads/1/3/2/3/132302718/4f5e87.pdf
    • http://xomiv.keniaduzit.com/uploads/1/3/2/8/132814930/2176474.pdf
    • http://files.oxtapas.com/uploads/1/3/0/8/130814402/b673cb0681fd193.pdf
    • https://cdn.shopify.com/s/files/1/0429/2067/3433/files/manual_prctico_del_operador_de_calderas_industriales_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0427/7587/1654/files/99054833900.pdf
    • https://cdn.shopify.com/s/files/1/0432/3475/4728/files/velafaxutumabekifuzu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/exploring_psychology_in_modules_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/2457/9751/files/dulojibejigu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9416/3109/files/sokekedatopolupamatavituj.pdf
    • https://cdn.shopify.com/s/files/1/0443/2376/6428/files/analisis_de_la_pelicula_cadena_de_favores.pdf
    • https://cdn.shopify.com/s/files/1/0432/7551/8107/files/51276327572.pdf
    • https://cdn.shopify.com/s/files/1/0435/3890/7288/files/xisos.pdf
    • https://cdn.shopify.com/s/files/1/0431/9979/1265/files/jevimonegobukov.pdf
    • https://cdn.shopify.com/s/files/1/0429/1110/5183/files/74242001132.pdf
    • https://cdn.shopify.com/s/files/1/0429/5580/0739/files/harley_dyna_service_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0094/6073/files/31065597835.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f35.bin
0be3bfa92d468b15f9ca38c851c951b5a58e0f5d3114925c0da48b7ee5c488ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F35 5264 bytes
font_01_sfnt_off0000712c.bin
98f388387273b419d0615e035936ebd6316f9e9166dc8450539c0637f5719611
pdf-font-stream PDF embedded font (sfnt) at offset 0x712C 9896 bytes
font_02_sfnt_off0000930a.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x930A 4324 bytes