Malicious PDF — malware analysis report

Static analysis result for SHA-256 adec47df73df1fb6…

MALICIOUS

PDF

54.3 KB Created: 2020-08-20 20:01:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efbbc24118e1b21a60304b6e4284de00 SHA-1: 4f6befd4a05ebc1d7dfd944d9e348232d4016fc8 SHA-256: adec47df73df1fb6c349e37d8924ad079b206c0dd3f6429e81bd15f5932433b2
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service (ttraff.cc) known to host malicious content. The ML classifier strongly flagged this PDF as malicious. The document body itself contains garbled text but includes the same redirector URL and a large number of Shopify-hosted PDF links, suggesting a link farm or redirection tactic to obscure the final malicious destination.

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.cc/pify?keyword=additional+directorate+general+of+public+information
    • http://xazidelug.preppantherplace.com/uploads/1/3/2/3/132302868/1542293.pdf
    • http://files.jeffersonhealthcarefoundation.org/uploads/1/3/1/4/131406434/tasowinegif.pdf
    • https://cdn.shopify.com/s/files/1/0434/5387/4329/files/79889138814.pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2042/files/kajenogakogobapuwo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5624/1557/files/daxisopijanolubuto.pdf
    • https://cdn.shopify.com/s/files/1/0447/0757/8009/files/diccionario_biblico_mundo_hispano_completo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/4077026649.pdf
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/jixedigozunudetuwugu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/5242100803.pdf
    • https://cdn.shopify.com/s/files/1/0431/9772/6880/files/autorun_virus_remover_free_full_version.pdf
    • https://cdn.shopify.com/s/files/1/0438/3227/9200/files/xudividasodefupojodisewa.pdf
    • https://cdn.shopify.com/s/files/1/0439/1780/3675/files/minutes_of_meeting_template_free_excel.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/lenefabopidatewux.pdf
    • https://cdn.shopify.com/s/files/1/0430/8123/6634/files/formulas_and_functions_in_excel_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/rpg_maker_mv_igg.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c6f.bin
59fb0707d602ecb3ff617a9c489674ca61e191fb143c8e40ef188a5084cca5cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6F 5308 bytes
font_01_sfnt_off00007e54.bin
33d97028d68f0957366efb264fed584e627883d0ed8d7b6e5df29d85e1c6ae65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E54 2992 bytes
font_02_sfnt_off000089e7.bin
320c0f6dbfdd4fb706939414851fdfaa6836a59c4a22fca472bc2c352548df8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89E7 10912 bytes
font_03_sfnt_off0000af11.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF11 4324 bytes
font_04_sfnt_off0000bd11.bin
8c5adaac28a1b9c3a2b09723a54d1e456a4011b4b59c680fd5a5160d8dd010de		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD11 3648 bytes

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