Malicious PDF — malware analysis report

Static analysis result for SHA-256 965e5f4138f18f60…

MALICIOUS

PDF

38.7 KB Created: 2020-08-01 15:55:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6d8b078fbff041727e0432fdf6c02a6 SHA-1: add4ce029fd30c6700a516d4c9a3d9375b48081f SHA-256: 965e5f4138f18f6021849e39091b8dc24a7b48f003ac6813b4167cf759163fdf
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm designed to appear as a legitimate download for Nvidia drivers, but it redirects to malicious infrastructure. The primary malicious URL identified is https://ttraff.cc/pify?keyword=nvidia+auto+detect. The document body contains obfuscated text and embedded URLs, including the malicious redirector and numerous benign-looking PDF files hosted on Shopify. The presence of a call-to-action button further supports the lure.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=nvidia+auto+detect
    • http://files.fabaarts.org/uploads/1/3/1/0/131070051/lajarugagino.pdf
    • http://files.ccsgo.org/uploads/1/3/0/7/130739204/rulisubefaz.pdf
    • http://files.msschatz4thgrade.com/uploads/1/3/0/7/130775328/2e359f12f2d1429.pdf
    • https://cdn.shopify.com/s/files/1/0429/7247/9647/files/somalasidozixujutixagiwi.pdf
    • https://cdn.shopify.com/s/files/1/0438/5262/8118/files/2246332070.pdf
    • https://cdn.shopify.com/s/files/1/0437/2732/3301/files/gebulubaxenutonidonizifi.pdf
    • https://cdn.shopify.com/s/files/1/0439/4863/8363/files/razovit.pdf
    • https://cdn.shopify.com/s/files/1/0434/7274/8710/files/bijolodu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35035436777.pdf
    • https://cdn.shopify.com/s/files/1/0435/3464/7445/files/18284139715.pdf
    • https://cdn.shopify.com/s/files/1/0433/6176/3480/files/pepovotuzijitosazifeka.pdf
    • https://cdn.shopify.com/s/files/1/0439/1577/2059/files/88778897459.pdf
    • https://cdn.shopify.com/s/files/1/0431/8307/9584/files/rimebokabevelem.pdf
    • https://cdn.shopify.com/s/files/1/0434/1687/9271/files/lifevumeluf.pdf
    • https://cdn.shopify.com/s/files/1/0428/5625/1559/files/16884146312.pdf
    • https://cdn.shopify.com/s/files/1/0436/9724/2280/files/78619503897.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_off000059b1.bin
ba205214e4902c4b6d6a42f0f9b0ba52356f4e53bad5363cac1b9146c14a9a56
pdf-font-stream PDF embedded font (sfnt) at offset 0x59B1 4656 bytes
font_01_sfnt_off000069a7.bin
4f7c304ba90b2b190c1be1458557da23ff1be8bb58b912a47e17db4348963145
pdf-font-stream PDF embedded font (sfnt) at offset 0x69A7 10752 bytes