Malicious PDF — malware analysis report

Static analysis result for SHA-256 3724a7432f20e8b1…

MALICIOUS

PDF

44.2 KB Created: 2020-08-12 01:21:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fca642bc64a1ec86ab24dd3a3fda156 SHA-1: 97d2c7b785243f1c25337a8bf980c447e8ba9ca2 SHA-256: 3724a7432f20e8b170293e41b7b5ece53e06eb69a4b1f8b6b8fdd89ee654ecae
152 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF SEO link farm, embedding numerous external links, with the primary malicious URL being https://ttraff.ru/pify?keyword=%25D0%25B8%25D1%2581%25D0%25BA%25D1%2583%25D1%2581%25D1%2581%25D1%2582%25D0%25B2%25D0%25BE+%25D0%25B2%25D0%25BE%25D0%25B9%25D0%25BD%25D1%258B+%25D0%25B2+%25D0%25B8%25D0%25BB%25D0%25BB%25D1%258E%25D1%2581%25D1%2582%25D1%2580%25D0%25B0%25D1%2586%25D0%25B8%25D1%258F%25D1%2585+pdf. The document body is heavily obfuscated and contains embedded URLs, further supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=%25D0%25B8%25D1%2581%25D0%25BA%25D1%2583%25D1%2581%25D1%2581%25D1%2582%25D0%25B2%25D0%25BE+%25D0%25B2%25D0%25BE%25D0%25B9%25D0%25BD%25D1%258B+%25D0%25B2+%25D0%25B8%25D0%25BB%25D0%25BB%25D1%258E%25D1%2581%25D1%2582%25D1%2580%25D0%25B0%25D1%2586%25D0%25B8%25D1%258F%25D1%2585+pdf
    • http://files.asenathmustang.com/uploads/1/3/0/9/130969192/duwazagegiw.pdf
    • http://files.emilyjernigan.com/uploads/1/3/0/8/130874218/3776417.pdf
    • http://nadon.physicianmummyuk.com/uploads/1/3/1/1/131163635/584375ff42721.pdf
    • http://files.ahhousecleaning.com/uploads/1/3/1/4/131409200/wivobagukarawafisosa.pdf
    • http://files.kmcbconsultancy.com/uploads/1/3/1/4/131407668/laserefizul.pdf
    • https://cdn.shopify.com/s/files/1/0433/8394/7414/files/shake_it_out_glee_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/9440/0414/files/76576942035.pdf
    • https://cdn.shopify.com/s/files/1/0432/0490/3067/files/62555138928.pdf
    • https://cdn.shopify.com/s/files/1/0436/5041/6793/files/zinug.pdf
    • https://cdn.shopify.com/s/files/1/0439/2170/3067/files/36471531709.pdf
    • https://cdn.shopify.com/s/files/1/0447/1944/0028/files/pdf_editor_software_free_download_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/1062/9532/files/wudirurulipadaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/0860/5859/files/thomas_finney_calculus_and_analytic_geometry.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/pavaxifupegaxezujixu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6443/4592/files/35921071230.pdf
    • https://cdn.shopify.com/s/files/1/0430/3618/0634/files/lobazagijotexijopavonedo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8023/6702/files/nissan_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/3495/9259/files/bushido_the_warrior_s_code.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/
    • https://cdn.shopify.com/s/files/1/0432/8023/6702/files/nissan_repair_manu

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fec.bin
583433e60ba292c5ad2c6808609fd16df8c65be39fe65acada807436a223b1c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FEC 6236 bytes
font_01_sfnt_off0000748b.bin
d7c384d4abc903e3d2bf4dfb0e8832061b08627db3b3bf68c77c90e59c199d21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x748B 13968 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.