Malicious PDF — malware analysis report

Static analysis result for SHA-256 915d7f9fdd5138e9…

MALICIOUS

PDF

62.4 KB Created: 2020-08-08 14:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56e16e3e31e097cf1bd1b39d6548c658 SHA-1: dbc609d694b810a9a6cbacc8a8877f95d27672e5 SHA-256: 915d7f9fdd5138e94a53162b7aa8754982e2c5052b3bcfca98d0137f11a2538e
128 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it's a malicious redirector and part of a link farm, likely intended to lure users with fake invoice or payment content. The primary malicious URL identified is https://ttraff.ru/pify?keyword=balance+of+payment+of+pakistan+pdf, which is linked to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to payment and PDF, reinforcing the lure. No scripts were extracted, limiting the analysis of direct payload execution.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=balance+of+payment+of+pakistan+pdf
    • http://files.grizzlyridgeupcycle.com/uploads/1/3/1/1/131164310/rexube-kowez-xukaxeguti-momoben.pdf
    • http://lidev.jenreidphotoart.com/uploads/1/3/0/7/130738799/c2db5e7d2aac.pdf
    • http://joburaxor.i95tradecenter.com/uploads/1/3/1/1/131163599/80fdeb.pdf
    • http://files.oshkoshcarpetcleaning.com/uploads/1/3/1/0/131070527/didovatifozuba.pdf
    • http://files.cidangelcarpetcleaning.com/uploads/1/3/2/7/132740399/filidavosatujok.pdf
    • https://cdn.shopify.com/s/files/1/0433/5625/8454/files/foxit_mobile_reader_for_android_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6125/6096/files/74156118810.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97897646990.pdf
    • https://cdn.shopify.com/s/files/1/0428/9147/7148/files/dituv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72518400380.pdf
    • https://cdn.shopify.com/s/files/1/0435/2026/2308/files/kawizekegijeresojuzo.pdf
    • https://cdn.shopify.com/s/files/1/0440/9311/2472/files/rovitixoduz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9573/6988/files/jakuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/0877/0726/files/fofufasulafojosidubinake.pdf
    • https://cdn.shopify.com/s/files/1/0432/8777/3342/files/babajesirujexoviburirofe.pdf
    • https://cdn.shopify.com/s/files/1/0434/6871/8242/files/amazon_web_services_tutorial_point.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vejut.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_off0000a86c.bin
5e59a854cc60730c2d1ba15e082cabf44f2889de30e156cf5c4875feb6e00912		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA86C 5208 bytes
font_01_sfnt_off0000ba13.bin
7b67418793bc48209a72eed934f415f818e483adb1dceb5ea3e1983a7cb1a34e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA13 10604 bytes
font_02_sfnt_off0000de4b.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4B 4324 bytes

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