Malicious PDF — malware analysis report

Static analysis result for SHA-256 bae7bbf90df603dd…

MALICIOUS

PDF

52.7 KB Created: 2020-08-06 09:27:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c7e3911c1e5fe9b2c69bc29be6ee90d SHA-1: 54effc06aa10bb352624d334cfe28846774b8edf SHA-256: bae7bbf90df603dd50e0ce26dbbc6c3359cddcc226b7c8fec6c81a1d6659e713
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of the primary links directs to a known malicious redirector. This indicates a link farm or SEO poisoning attack designed to drive traffic to malicious sites. The document body itself contains garbled text but includes the malicious URL and several other PDF links.

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=metodo+anticonceptivo+billings+pdf
    • http://files.raymondbordogna.com/uploads/1/3/1/4/131452824/lajudovononakilo.pdf
    • http://files.flagstaffpottersguild.com/uploads/1/3/0/8/130814235/rudufijinogupigiw.pdf
    • http://files.homeschoolingthespectrum.com/uploads/1/3/0/7/130775197/7989077.pdf
    • http://files.goldcoastmodelrailwayclub.com/uploads/1/3/0/7/130775515/2605247.pdf
    • http://files.busybeeorganize.ca/uploads/1/3/0/9/130969004/gojebifazalomo-maxurapokenoxo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5197/3789/files/analog_to_digital_converter_nptel.pdf
    • https://cdn.shopify.com/s/files/1/0438/1566/5824/files/tabekagavorefazetigaz.pdf
    • https://cdn.shopify.com/s/files/1/0436/9963/4326/files/munip.pdf
    • https://cdn.shopify.com/s/files/1/0430/4168/5665/files/arduino_uno_working_principle.pdf
    • https://cdn.shopify.com/s/files/1/0435/2717/6344/files/2166153480.pdf
    • https://cdn.shopify.com/s/files/1/0429/5521/0905/files/26571445893.pdf
    • https://cdn.shopify.com/s/files/1/0431/3464/8474/files/palojebulivifadekaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/9058/3464/files/mibugudareturiwuja.pdf
    • https://cdn.shopify.com/s/files/1/0443/8884/3686/files/human_resources_cover_letter.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/19000378019.pdf
    • https://cdn.shopify.com/s/files/1/0430/8582/4154/files/17942938723.pdf
    • https://cdn.shopify.com/s/files/1/0432/7571/4715/files/30779824145.pdf
    • https://cdn.shopify.com/s/files/1/0428/7463/4403/files/5859701795.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_off00008f09.bin
e799a7c6df8084dbe1e833233e983240181b0281e109060bfa7445533215481f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F09 5432 bytes
font_01_sfnt_off0000a1b0.bin
b6379e6b77cf01690da8c879297bb2559b3d091bb215f5202b45784b2cda4b92
pdf-font-stream PDF embedded font (sfnt) at offset 0xA1B0 10600 bytes