Malicious PDF — malware analysis report

Static analysis result for SHA-256 f461dfe453e47060…

MALICIOUS

PDF

37.6 KB Created: 2020-08-10 12:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dde7e956dc36e9e2653c8b86b8ce3b33 SHA-1: b158a2b7a126c142bce11ee430c3703f06eb8360 SHA-256: f461dfe453e47060f8501d87fe768a4781391d20adb378e89d7dbdc35fa915db
152 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier as malicious. It contains a large number of embedded links, with one specifically pointing to a known malicious redirector infrastructure (ttraff.cc). The document body, though partially corrupted, also contains references to these links, suggesting a coordinated effort to distribute malicious content. The primary attack pattern involves luring users to click on these links, which likely lead to phishing pages or malware downloads.

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=jurnal+bioplastik+pdf
    • http://files.nzepiphytenetwork.org/uploads/1/3/0/8/130813511/0072bd42c3.pdf
    • http://files.sanjexseratti.com/uploads/1/3/2/6/132681544/benexelapu.pdf
    • http://files.betsabedelpilar.com/uploads/1/3/0/7/130775405/tetis_funadiniri_buguxuvejewox_lodewajiw.pdf
    • http://vizada.emergencytrainingcc.com/uploads/1/3/1/3/131398140/bapuzelanuveg_muzinekojosi_robim.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/jefumeviwufoxexopelow.pdf
    • https://cdn.shopify.com/s/files/1/0428/3334/6719/files/dadoxigavukowoxuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/1264/4251/files/southwest_check_in_flight.pdf
    • https://cdn.shopify.com/s/files/1/0432/9983/1966/files/middle_sounds_worksheets_for_kindergarten.pdf
    • https://cdn.shopify.com/s/files/1/0436/1384/7710/files/passport_application_forms_uganda.pdf
    • https://cdn.shopify.com/s/files/1/0438/1566/5826/files/bujemuvagalepise.pdf
    • https://cdn.shopify.com/s/files/1/0438/0301/7373/files/las_28_creencias_delos_adventistas.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5814/files/wixawobeziripunomejil.pdf
    • https://cdn.shopify.com/s/files/1/0432/2436/7262/files/mojegufolafu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2471/9773/files/odisha_govt_holiday_calendar_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/20768536953.pdf
    • https://cdn.shopify.com/s/files/1/0428/8859/3571/files/87829093797.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_off000054ff.bin
7fb5143c4e0341c5d39af2ec4cbd91ae6e0f182d2bf6ebf23873f480339d686a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54FF 5228 bytes
font_01_sfnt_off000066d2.bin
1f86f8e7a683cf6066579f66ec5d37a7ab13709a6284822ffc19ea8273091ef5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66D2 10192 bytes

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