Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae6af00dcc665ef…

MALICIOUS

PDF

51.0 KB Created: 2020-08-12 01:06:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0f335cc7d6286d044baa9257d340ac6 SHA-1: d45f8a757dda4b6c524cee95181119a7d0e30f14 SHA-256: 0ae6af00dcc665ef7055f0e7a71e58448468d552f0fba60a554ba5e0c6fef9e2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, also contains the primary malicious URL. This suggests an attempt to direct users to potentially harmful content under the guise of educational material.

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.com/pify?keyword=cours+d+anglais+complet+gratuit+pdf
    • http://files.eceaministries.org/uploads/1/3/0/7/130775372/fbf32e0.pdf
    • http://nanava.createweddingsandevents.com/uploads/1/3/0/8/130874431/visozuf.pdf
    • http://files.jillianabrownphotography.com/uploads/1/3/0/7/130739513/1d3abcb3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/7149/4554/files/74827053738.pdf
    • https://cdn.shopify.com/s/files/1/0447/7665/2949/files/to_infinitive_bare_infinitive_gerund_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0435/6381/0975/files/fulopigugaxujejifubok.pdf
    • https://cdn.shopify.com/s/files/1/0433/9118/9157/files/47856589242.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kamunikizesow.pdf
    • https://cdn.shopify.com/s/files/1/0434/7723/7920/files/bhakti_yoga_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/9365/5716/files/postgres_show_indexes.pdf
    • https://cdn.shopify.com/s/files/1/0435/8144/0168/files/frecuencia_cardiaca_ejercicio.pdf
    • https://cdn.shopify.com/s/files/1/0433/6769/4490/files/54601344178.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8395/files/chemistry_book_class_10.pdf
    • https://cdn.shopify.com/s/files/1/0431/6525/3792/files/21322723311.pdf
    • https://cdn.shopify.com/s/files/1/0429/8814/2743/files/xelikawogisiponipewod.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fd8.bin
563fef592b51cbec05e2d072e9be4c07eb81ac68c9b55e80837c7c40f68c717f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD8 5380 bytes
font_01_sfnt_off0000820e.bin
be77a1553a40c04ef4d8e14cfd3b35f158a3e290c1e0c9a63145715ca8152666		 pdf-font-stream PDF embedded font (sfnt) at offset 0x820E 12088 bytes
font_02_sfnt_off0000a794.bin
531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA794 16312 bytes

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