Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c86440e63a130ec…

MALICIOUS

PDF

46.5 KB Created: 2020-08-29 06:06:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98866cfffdfca855d64b8f8f818d20cc SHA-1: f4630ab212280d6505b4e5db3baa949bd51dbb14 SHA-256: 3c86440e63a130ec99f50b7ae15d09e9d839474421d60fdff520f89e93bd55d2
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to `https://ttraff.cc/wix?keyword=multitrack+musique+mixer+principiant`. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many pointing to Shopify domains. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirector URL and appears to be a lure for the mixer software.

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/wix?keyword=multitrack+musique+mixer+principiant
    • https://static.usrfiles.com/ugd/b8c837_4d7cf7449f994085882a662e3ea1e713.pdf
    • https://static.usrfiles.com/ugd/b8c837_46f6a3b0ad8842e9a77841f0ba807c20.pdf
    • https://static.usrfiles.com/ugd/b8c837_27577276623640c6a825ef9012684114.pdf
    • https://cdn.shopify.com/s/files/1/0435/6970/9217/files/76140195505.pdf
    • https://cdn.shopify.com/s/files/1/0433/8991/1194/files/nimefigamozumelabe.pdf
    • https://cdn.shopify.com/s/files/1/0437/4944/1687/files/vixipakasisofopovugorol.pdf
    • https://cdn.shopify.com/s/files/1/0429/6232/1567/files/acute_ischemic_stroke_definition.pdf
    • https://cdn.shopify.com/s/files/1/0437/2014/7095/files/clinical_nutrition_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0434/2661/1356/files/roleramefoxize.pdf
    • https://cdn.shopify.com/s/files/1/0433/2044/3045/files/alfabeto_hebreo_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0429/4233/3084/files/kezivufuwibokote.pdf
    • https://cdn.shopify.com/s/files/1/0437/2230/9786/files/fundamentals_of_heat_transfer_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1281/files/58525143520.pdf
    • https://cdn.shopify.com/s/files/1/0434/2140/1237/files/arapahoe_county_personal_property_tax_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/0445/2246/files/domexu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0389/4171/files/4913947544.pdf
    • https://cdn.shopify.com/s/files/1/0451/0570/9219/files/anabolismo_proteico.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_off00006974.bin
7e69e6c68b84bc4d3e07fa66f6699532c40e6ed8f66ed5738978a4d2704bea0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6974 5344 bytes
font_01_sfnt_off00007b8d.bin
541d972e3e7a64b8dbab9c7b93e3ecb87fd27192d032c7a62da4e22c214e5040
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B8D 4620 bytes
font_02_sfnt_off000088ab.bin
9903074e31266a85cef5c1b580f34372fb8c489978a8e589700b5b558b0c0af4
pdf-font-stream PDF embedded font (sfnt) at offset 0x88AB 10508 bytes