Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3d9bdceabf9c852…

MALICIOUS

PDF

41.2 KB Created: 2020-10-14 06:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6506b05e0f825bdf2113a7b50c2f8cba SHA-1: bca9510a834ce3f5e2136e9c4d31efdcf75156c3 SHA-256: e3d9bdceabf9c85208d6b5708ab1c55464f6a3956899e58a734bd2bdf3dc9c08
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify and Weebly. One of the primary links, 'https://cctraff.ru/strik?keyword=the+hacker+playbook+2+pdf+download+free', is flagged as a malicious redirector. This suggests the document is part of a link farm designed to lure users to malicious sites under the guise of providing free PDF downloads. No scripts were extracted, but the presence of numerous links and the malicious redirector strongly indicate a phishing or malware distribution attempt.

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://cctraff.ru/strik?keyword=the+hacker+playbook+2+pdf+download+free In PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/bosilo_ginasesif.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/a8401ec7a9859.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/44d87feaf8ee.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/zanadutut_wexudafenatogun_jetomefoja.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/1696278.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8127/5808/files/riwupoda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/2199/8501/files/subjective_ethical_relativism_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6116/5723/files/jozub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/4118/9788/files/alexander_hamilton_ron_chernow_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4902/0311/files/16760549987.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/9651/4972/files/nubepe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7327/8630/files/53836302906.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/6945/8582/files/29217599497.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2665/2055/files/game_of_thrones_ascent_reincarnation_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3315/6001/files/potion_of_waterbreathing_minecraft_xbox_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5663/9383/files/epic_theater_orlando.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6642/3456/files/sm64_rom_hacks.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60D2 5544 bytes
SHA-256: 7d76ab86f5b534e6f39fdaf722af6f9e23f0d32f0d45f03cd9464aaa4c382903
font_01_sfnt_off000073bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73BC 10564 bytes
SHA-256: d8390680c5cf8c5191be2f32f0a6edc6f24f4fb394c67e105c9e0cb56ae4f501

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