Malicious PDF — malware analysis report

Static analysis result for SHA-256 da46f959bf8a0c9d…

MALICIOUS

PDF

56.7 KB Created: 2020-08-05 06:01:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3353202bfd530207b4dc20f0685d3aea SHA-1: b6b0ffbe421e1476a4b49a5d82c941f5501f0124 SHA-256: da46f959bf8a0c9dae6a23fcafcf254d068be3d7b7ff5ca838750dd781c9563c
128 Risk Score

Malware Insights

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

The PDF file contains a lure related to an accounting internship report, designed to entice users to click on embedded links. One such link, https://ttraff.ru/wb?keyword=accounting%20internship%20report%20sample%20pdf, is identified as a malicious redirector. The file also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on cdn.shopify.com. The presence of these elements suggests a phishing or redirection attack.

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/wb?keyword=accounting%20internship%20report%20sample%20pdf
    • http://files.teamgodent.com/uploads/1/3/1/3/131379248/zalitixaxo_lojoferax_zurizeli_buvem.pdf
    • http://files.challenge2grow.be/uploads/1/3/1/1/131163658/6531434.pdf
    • http://files.vintage3djoes.com/uploads/1/3/2/7/132740606/fcde078518.pdf
    • https://cdn.shopify.com/s/files/1/0432/5936/3488/files/84329032041.pdf
    • https://cdn.shopify.com/s/files/1/0433/7513/2824/files/93518869083.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/18490008714.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/18983443830.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5079/files/22330087508.pdf
    • https://cdn.shopify.com/s/files/1/0437/0527/0437/files/pukizogatokifagogemewuted.pdf
    • https://cdn.shopify.com/s/files/1/0435/9582/5320/files/14287311216.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6505/files/vitirodewajotuwozisifobi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4070/9527/files/venous_ulcer_vs_arterial_ulcer.pdf
    • https://cdn.shopify.com/s/files/1/0432/3042/9352/files/33046929085.pdf
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/rijipifebukaxuz.pdf
    • https://cdn.shopify.com/s/files/1/0440/5598/6326/files/bazuronav.pdf
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/tufez.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/
    • https://cdn.shopify.com/s/files/1/0435/9582/5320/files

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009f87.bin
f8e64c52e4baa7e20e0289e561916e79004b55abb2cc230e6dc386d47fe3329b
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F87 5556 bytes
font_01_sfnt_off0000b246.bin
07b3249acf0263781a347f9c86a5b5fae0527be48c53c2bc1dbf395aff56b0aa
pdf-font-stream PDF embedded font (sfnt) at offset 0xB246 10568 bytes