Malicious PDF — malware analysis report

Static analysis result for SHA-256 9829f87e0c34861e…

MALICIOUS

PDF

67.5 KB Created: 2020-08-13 07:51:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab2e3a8b72c4582e13106c17b722910b SHA-1: a12006541851f9d5962e68bb4abe9393c2e27b31 SHA-256: 9829f87e0c34861e3faafb96b7bf922afb1bd08d998e4be53d457e14ec0b6aa1
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a critical heuristic indicating it's a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of a 'download button' heuristic further supports the social engineering aspect. The file is likely designed to trick users into visiting the malicious URL, potentially leading to further compromise.

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.ru/pify?keyword=avancemos+2+practice+workbook+answers+pdf
    • http://files.tjeducationalleader.com/uploads/1/3/0/7/130775934/varog.pdf
    • http://files.teachingtheapocalypse.com/uploads/1/3/0/8/130874278/fenalexiwo.pdf
    • http://files.fionahill.net/uploads/1/3/1/4/131437584/wufaro-fexodato-kowivukine.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/eros_guide_las_vegas.pdf
    • https://cdn.shopify.com/s/files/1/0430/2897/1681/files/22073433108.pdf
    • https://cdn.shopify.com/s/files/1/0434/8903/4402/files/respuestas_cortas_a_grandes_preguntas.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1797/files/rizatafemolexapu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/vaforuka.pdf
    • https://cdn.shopify.com/s/files/1/0430/7845/1351/files/20545451271.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/c_p_singh_physics_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/aviation_dictionary_jeppesen.pdf
    • https://cdn.shopify.com/s/files/1/0429/5314/6517/files/suxovugotax.pdf
    • https://cdn.shopify.com/s/files/1/0429/6913/7305/files/bretton_woods_institutions_and_africa.pdf
    • https://cdn.shopify.com/s/files/1/0437/7785/1549/files/brisbane_transport_map.pdf
    • https://cdn.shopify.com/s/files/1/0431/6499/1649/files/algebra_1_system_of_equations_word_problems.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_off0000c4df.bin
8e3553e2f23823700af57191f672e8b2d024e67f6d04311f76e991af931b6831
pdf-font-stream PDF embedded font (sfnt) at offset 0xC4DF 5744 bytes
font_01_sfnt_off0000d866.bin
9a9037c3ec052f7d36ea9eacd491f1109d7721e90074b7491b6bc0aca0bdd137
pdf-font-stream PDF embedded font (sfnt) at offset 0xD866 12392 bytes