Malicious PDF — malware analysis report

Static analysis result for SHA-256 0384c96d3f649c0d…

MALICIOUS

PDF

42.4 KB Created: 2020-10-18 00:55:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 786b066b0897c4e6f6f56e13ff1897f5 SHA-1: 2488eae445afaa4dd4af33ee620677ff194bc3fd SHA-256: 0384c96d3f649c0ddb1f0ebf7122cf1f6910f4c74c68c72035aeb16b763bf14d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files, indicating a link farm for SEO manipulation. One of the primary links, 'https://ttraff.me/123?keyword=solving+and+graphing+inequalities+worksheet+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains similar URLs, suggesting the primary goal is to redirect users to malicious infrastructure.

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.me/123?keyword=solving+and+graphing+inequalities+worksheet+pdf In PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/fubisi.pdfIn PDF document text
    • https://noxepelobisuse.weebly.com/uploads/1/3/1/8/131871648/xopitamonuj-lilijemevaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/6719c0bc-e85f-4fa8-a4b1-d5a2d1818df6/1222491727.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eb52db7-7edc-4ddd-9333-841a7018dfc3/ludaxapisasanaxapiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cde36a57-bf8c-4d91-acd4-4ae028e47e2f/o_palan_hare_mp3_song_download_pagalworld.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db8841bf-2af8-4a97-b833-6c7670cbcda6/zokazaniwapitaziseva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bc2bfd9-e0da-4ca1-aa90-8424658ee6db/nazefojutadebiguramo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0632/8985/files/51600204348.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1463/8744/files/70558625182.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9712/9109/files/riwotijukawefelamefi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1799/3877/files/cottonwood_tree_bark_for_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7670/5690/files/ucsd_student_health_services_pharmacy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6545/3975/files/aviation_mechanic_handbook_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0181/3443/files/pagivinerogukowov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6815/2216/files/13430137846.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4672/2965/files/pawuxuxawinafotejafakapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9530/3355/files/c_span_channel_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9574/7488/files/mary_chilton_grave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6404ea0-a907-4632-88e1-af457a535762/37317018251.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6439255-ea22-4e2a-abba-e0755342fc8b/welikedisarelumod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/031c4f30-2255-4217-ba81-976ac2d35f13/76936355982.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f737c5f-b0cf-483a-ac8a-c9f1c13e96d4/zotabatedepiwuditer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b19cebd8-9da8-418a-8136-79d60896a963/92260869320.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57AA 5632 bytes
SHA-256: 7f841981d518bebc9e46eeda81a52391e268f5f5afa8119b52aa3190fc575e91
font_01_sfnt_off00006aca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ACA 9724 bytes
SHA-256: 8aa6b3602b631ae5c5bfc753b7e8d6176e9cb7a08b98042f650e63c9d493a551
font_02_sfnt_off00008c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C28 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378