Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b06f37022a8cff2…

MALICIOUS

PDF

107.8 KB Created: 2020-10-28 00:36:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a53cad643c57f89d9e5807013a3258fd SHA-1: 187c748e22c29fb9c142130452fba62d6105c41c SHA-256: 7b06f37022a8cff2c784ecf4da42751bc7815f707be426b99c1b3bb58fddbf38
162 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with many pointing to Shopify domains, but one critical link redirects to a known malicious domain. This suggests a tactic of disguising malicious links within a larger, seemingly benign set of links. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=fairy+rings+osrs In PDF document text
    • https://taburexil.weebly.com/uploads/1/3/4/3/134374137/namovavem.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/1d32287.pdfIn PDF document text
    • https://jizonuwuko.weebly.com/uploads/1/3/0/8/130814311/vonugumazagusu.pdfIn PDF document text
    • https://sofuwikomu.weebly.com/uploads/1/3/4/3/134308783/nujon-judavod-xekaviraba.pdfIn PDF document text
    • https://pidakobanaxob.weebly.com/uploads/1/3/4/4/134463411/2751832.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/1/0499/3941/5191/files/urbana_at_felisa_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7897/0272/files/23034514453.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4726/3131/files/toneteli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3952/1444/files/cisco_5508_firewall_configuration_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/4812/4575/files/fisawe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5429/1361/files/activity_1.8_word_search_plate_tectonics_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b69223f6-7360-403a-8be2-b66459348dff/21622414394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81a6be68-d8fe-4cfd-aea6-8de4492f1446/shaker_kitchen_cabinets_plans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3edf731-1846-451f-b926-067d0a097b94/87214791903.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31363264-ba2f-4820-aec4-0d8c5a3061c2/49812424270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ece727e-a9ea-4f6f-8080-640b48f6f17b/poranek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7897/0272/files/pafuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1524/1369/files/yanmar_diesel_engine_repair_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/78811345034.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_off00016bb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BB8 4876 bytes
SHA-256: 2ca4c356b1011d11406ef84fdf7593d36dabf6597a1b8c7961c3c87a03d9ed31
font_01_sfnt_off00017c68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C68 10920 bytes
SHA-256: 6ffc1e20257772a12d1ab82d7869e270d24ce487bc42bd42f3a54c9d6d94f43a

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