Malicious PDF — malware analysis report

Static analysis result for SHA-256 25f23e0174f644a6…

MALICIOUS

PDF

33.9 KB Created: 2020-08-06 00:19:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b4adf13ac1d172f6781d1f8dfcf6270 SHA-1: b9ae28a3aa604d988709fc03ac8ec4e5e3944981 SHA-256: 25f23e0174f644a610fa53b46698311a53044f299ebacb254feb42d133f1b117
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to known malicious infrastructure at ttraff.ru. The document body, though heavily obfuscated, contains the same lure text and URLs as found in the heuristics, indicating a deliberate attempt to redirect users to potentially harmful content. The primary malicious URL identified is https://ttraff.ru/pify?keyword=amar+chitra+katha+pdf+ebook.

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.ru/pify?keyword=amar+chitra+katha+pdf+ebook
    • http://files.lsten.net/uploads/1/3/2/6/132681767/8367276.pdf
    • http://files.phenpro.com/uploads/1/3/0/7/130739155/zosibizikifafuwugat.pdf
    • http://files.fkelmusic.com/uploads/1/3/1/4/131407112/vekonenofabotiv.pdf
    • http://files.sachagrosselart.com/uploads/1/3/0/9/130969209/belizifimekedaxuwuzu.pdf
    • http://files.llgeans.com/uploads/1/3/0/7/130739443/sewafuxizeretan.pdf
    • https://cdn.shopify.com/s/files/1/0429/4852/6246/files/87416289035.pdf
    • https://cdn.shopify.com/s/files/1/0448/6466/7810/files/bioprocess_engineering_shuler.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/vixobeseritonar.pdf
    • https://cdn.shopify.com/s/files/1/0430/2818/5239/files/fiwejuvegavajimikatoza.pdf
    • https://cdn.shopify.com/s/files/1/0434/8005/5965/files/alkyd_resins_technology_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0435/0096/1947/files/91770772660.pdf
    • https://cdn.shopify.com/s/files/1/0431/0394/4858/files/55612313607.pdf
    • https://cdn.shopify.com/s/files/1/0430/3847/4391/files/tavosugoze.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7741/files/savulijijana.pdf
    • https://cdn.shopify.com/s/files/1/0433/1667/4713/files/38608155397.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lufixupiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/4456/8216/files/goat_simulator_cheats.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_off00004708.bin
11e1ac9409f265c14f1b9edd4dadae4f8056e50fa4a943fdeaa8ef34b12ce149		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4708 5380 bytes
font_01_sfnt_off00005924.bin
923301720eb989165ada309d509be66da571e4edcb401d0f1f779bd7827286ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5924 9992 bytes

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