Malicious PDF — malware analysis report

Static analysis result for SHA-256 36c376289d46edb5…

MALICIOUS

PDF

42.5 KB Created: 2020-08-12 10:55:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bf92f607b12f1ac51d2055affd61ed5 SHA-1: a3f15b85d95d22d9427b73f1cd445970d064a6d6 SHA-256: 36c376289d46edb54c54d0ad38938fc5aa07525b401b074f0cb264b382b6afab
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one prominently leading to a malicious redirector at 'https://ttraff.com/pify?keyword=lean+six+sigma+green+belt+exam+pdf'. This URL is designed to lure users into clicking by impersonating a legitimate document title. The PDF also exhibits characteristics of a link farm, with numerous links pointing to various resources, including benign Shopify URLs, suggesting a broad distribution or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious.

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.com/pify?keyword=lean+six+sigma+green+belt+exam+pdf
    • http://files.ervenavenue.com/uploads/1/3/2/6/132681812/6356718.pdf
    • http://files.cherrycreekcheer.com/uploads/1/3/0/8/130813550/zebobeke-pupadat.pdf
    • http://files.thenorthwestblogger.co.uk/uploads/1/3/1/0/131071067/xolusifuxutip.pdf
    • http://files.bgiapts.com/uploads/1/3/1/4/131437380/kopobekonarug.pdf
    • https://cdn.shopify.com/s/files/1/0440/2351/3238/files/29552160113.pdf
    • https://cdn.shopify.com/s/files/1/0433/7221/6483/files/in_search_of_lost_time_online.pdf
    • https://cdn.shopify.com/s/files/1/0432/4933/6483/files/emergency_care_13th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/kipigixeduwir.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40035930655.pdf
    • https://cdn.shopify.com/s/files/1/0439/1701/7256/files/vadifegutuxotixixurirazu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jojanasesejunuveko.pdf
    • https://cdn.shopify.com/s/files/1/0434/7779/4982/files/pusepipodilidaruwod.pdf
    • https://cdn.shopify.com/s/files/1/0428/6775/3116/files/causes_of_bantu_migration_from_luba_lunda_kingdom.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4827/files/82278810790.pdf
    • https://cdn.shopify.com/s/files/1/0434/5312/0664/files/lumaxebakokipodamanif.pdf
    • https://cdn.shopify.com/s/files/1/0431/0918/7750/files/lesut.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/66464075882.pdf
    • https://cdn.shopify.com/s/files/1/0448/3593/0273/files/nawubixalajoxodaxigezatu.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_off00006437.bin
2ed1f2b95d2fcc2b5b209d2f26ab206da95663e1d8b40eed982be34edee8901c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6437 5508 bytes
font_01_sfnt_off000076d9.bin
2475e637f00d53738ab678a86a677b0f68811bcdc3433a3823c9b3b803efef4e
pdf-font-stream PDF embedded font (sfnt) at offset 0x76D9 11356 bytes