Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad29757868429f78…

MALICIOUS

PDF

42.1 KB Created: 2020-08-11 19:10:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a90b73b979af59ce0b00c93b5332292d SHA-1: 7d45b80e13629de5c73b739dd3129d5f85178022 SHA-256: ad29757868429f78329fb996dca5c70e5cdfaed7f3239b1c0fd5cddb3cf9a324
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a free download for a textbook. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the link leads to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which are to benign PDFs hosted on Shopify, likely to mask the malicious redirector. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=fundamentals+of+mathematical+physics+by+ab+gupta+pdf+free+download In PDF document text
    • http://files.annegreycollective.com/uploads/1/3/0/9/130969427/4c27f237b1bf333.pdfIn PDF document text
    • http://files.ziontbc.com/uploads/1/3/2/7/132712447/d7571e3f7bad0.pdfIn PDF document text
    • http://files.birchsage.com/uploads/1/3/0/7/130775432/8100379.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4798/4026/files/santa_biblia_descargar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/the_history_of_slavery_in_africa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/mastering_elliott_wave_by_glenn_neely.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7342/8890/files/maths_questions_for_class_6_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8220/3811/files/98567145054.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0401/8336/files/vewusidomilurewupe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0968/5150/files/probability_concepts_in_engineering_2nd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6055/7984/files/2575544315.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5100/5590/files/geledozupu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5420/2013/files/68239383109.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9280/3744/files/64742045035.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pigagijewunafusigiku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4563/3693/files/aplasia_medular_severa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5252/3929/files/78448545374.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f06.bin
f1f04a64a7ce993530431ad3f037878ade6edd8b6cbe49ad42c0f2af87028a19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F06 5860 bytes
font_01_sfnt_off000062de.bin
9a3a69a10f98a29e4814a8f6d678bcb14018f74ba12cd1a9bb15fe6fb2fb673a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62DE 9996 bytes
font_02_sfnt_off0000854f.bin
ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x854F 16164 bytes

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