Malicious PDF — malware analysis report

Static analysis result for SHA-256 98b9a13d1f86d040…

MALICIOUS

PDF

38.8 KB Created: 2020-08-22 13:27:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 942cb36e681870a8d964b57adcdeca0a SHA-1: 73478e582a6ae2c6eaa44811b24e6593df406604 SHA-256: 98b9a13d1f86d04001272421f33295cb9f23c99f180696cb81306ed8a9e212c9
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it is a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=billaberry+formal+shoes'. Additionally, another critical heuristic identified it as a PDF link farm, with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, also contains the primary malicious URL. This suggests the document's primary purpose is to lure users to malicious infrastructure.

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=billaberry+formal+shoes
    • http://files.rgreco-and-mchristian-presents.com/uploads/1/3/1/4/131483440/3053862.pdf
    • http://lavewuba.oatag.org/uploads/1/3/1/6/131636612/vuxuran-maxiruw-dejivevimeliku.pdf
    • http://zaret.rebeccagianotti.com/uploads/1/3/1/4/131452958/9728219.pdf
    • https://cdn.shopify.com/s/files/1/0438/4748/3557/files/26683109993.pdf
    • https://cdn.shopify.com/s/files/1/0430/3332/9817/files/43344519514.pdf
    • https://cdn.shopify.com/s/files/1/0434/5567/6568/files/venomovofav.pdf
    • https://cdn.shopify.com/s/files/1/0439/3077/9816/files/avogadro_s_law.pdf
    • https://cdn.shopify.com/s/files/1/0434/5122/0134/files/92149567826.pdf
    • https://cdn.shopify.com/s/files/1/0432/7482/9987/files/edgar_allan_poe_cuentos.pdf
    • https://cdn.shopify.com/s/files/1/0440/7354/9974/files/rilanodepanipiwegitebav.pdf
    • https://cdn.shopify.com/s/files/1/0434/0432/9125/files/restaurant_business_plan_sample_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0437/2017/9864/files/59650380746.pdf
    • https://cdn.shopify.com/s/files/1/0443/8884/3686/files/appositive_phrase_examples.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/wow_classic_enchanting_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/7270/1095/files/6477658236.pdf
    • https://cdn.shopify.com/s/files/1/0437/3636/7265/files/dudagutub.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_off00004479.bin
0f9b737cd70b97371a2e647eaf8685c0c5325e7112f4ebc197575f3ce2880789
pdf-font-stream PDF embedded font (sfnt) at offset 0x4479 5296 bytes
font_01_sfnt_off00005657.bin
b05bfb991c00cf6ea9ac50f9b770cb9b730ece52809d841132f51f6a0a1803a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5657 10060 bytes
font_02_sfnt_off000078e3.bin
3ec9e90669e0780cca0de55bc1249d9589ea34282c05581837472a8c853084ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x78E3 16168 bytes