Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee785bd65c2e061b…

MALICIOUS

PDF

56.3 KB Created: 2020-08-10 18:49:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfcb08986ca530148a2378b54e27ee0c SHA-1: 27ff46fcda18e26e9d29be8a062a37e9fa99cd0d SHA-256: ee785bd65c2e061b954414a3aed7cdf9b9e7edcf2d24cde3081fd39f52ef1a4e
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic firing indicates a direct link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=utmost+happiness+pdf'. This suggests the document is designed to redirect users to malicious sites, likely for phishing or malware distribution. No scripts were extracted, but the extensive link farm and redirector URL are strong indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=utmost+happiness+pdf
    • http://files.trainlikeaprodc.com/uploads/1/3/0/8/130814129/puvoko.pdf
    • http://files.timkentart.com/uploads/1/3/0/7/130776075/7659163.pdf
    • http://nokumod.erasmuspeak.com/uploads/1/3/1/6/131606349/dawiferije_nilumad.pdf
    • http://files.themkd.co.uk/uploads/1/3/0/8/130874490/675792.pdf
    • https://cdn.shopify.com/s/files/1/0429/2041/1289/files/revipiwixewujilowozapadij.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92904811518.pdf
    • https://cdn.shopify.com/s/files/1/0428/9839/1196/files/subitevawinozutudu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8957/6601/files/lightweight_viewer_windows_xp.pdf
    • https://cdn.shopify.com/s/files/1/0431/3179/7668/files/99349037751.pdf
    • https://cdn.shopify.com/s/files/1/0434/5177/7185/files/1854701612.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/governance_and_public_policy_notes.pdf
    • https://cdn.shopify.com/s/files/1/0434/1828/8285/files/42140967771.pdf
    • https://cdn.shopify.com/s/files/1/0434/1907/4712/files/prison_name_generator.pdf
    • https://cdn.shopify.com/s/files/1/0432/0195/3952/files/pujuma.pdf
    • https://cdn.shopify.com/s/files/1/0430/9748/9561/files/pelifafe.pdf
    • https://cdn.shopify.com/s/files/1/0432/2407/2349/files/sinusitis_tratamiento_antibiotico.pdf
    • https://cdn.shopify.com/s/files/1/0428/7938/5756/files/php_size_of_array.pdf
    • https://cdn.shopify.com/s/files/1/0437/2296/5160/files/20958765918.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_off00009c12.bin
8cc848be5a623aff209aba43e663023be246aee48cd8f5c01d5bb3e21ce6e188
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C12 5144 bytes
font_01_sfnt_off0000ad78.bin
a425e3e403852e0c67f5253de36f4fb17a4de5c06c3a3f2c65eb45148d0f6142
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD78 13376 bytes