Malicious PDF — malware analysis report

Static analysis result for SHA-256 318565966df41a76…

MALICIOUS

PDF

48.4 KB Created: 2020-10-27 19:29:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 379c4335fdb8f6a7370fa8e8fda89f44 SHA-1: 16c6e321563fcca6bb2cf5066ab3b1c6e5be9bb5 SHA-256: 318565966df41a76be7aaca476711dcae3031b1642fa5dce52fd16702c95d1a7
154 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to a link farm designed for SEO manipulation. One prominent URL, https://cctraff.ru/strik?keyword=shiba+inu+puppies+for+adoption+in+pa, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to cryptocurrency topics, suggesting a lure to drive traffic to malicious sites.

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=shiba+inu+puppies+for+adoption+in+pa In PDF document text
    • https://cdn-cms.f-static.net/uploads/4389361/normal_5f8e0599a8310.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407081/normal_5f91d5cd19817.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368731/normal_5f8b1d50e84a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403421/normal_5f928ac7f0f4e.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/jozodusexomupi.pdfIn PDF document text
    • https://wisizexabebaj.weebly.com/uploads/1/3/4/4/134461468/59b43e857af.pdfIn PDF document text
    • https://gatilavim.weebly.com/uploads/1/3/4/3/134391542/8001170.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/foguxek_woxogonedifuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384634/normal_5f8e65ca227a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373998/normal_5f9280c722c88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5f87a6da57f56.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/1/0433/0147/0366/files/maumee_high_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8613/8532/files/la_coexistence_pacifique_mythe_ou_ralit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7700/9052/files/solarwinds_bandwidth_calculator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8694/7500/files/70810817843.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/2719/1737/files/tewasunaxotu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dc2b3e4-58dd-494e-9812-7a1a323ec0b2/daligidekerixotomolit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97c660fb-d230-414a-8a25-a3cc0b0e90e4/pivixoguda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea1a164a-1742-445b-b369-fdbe99fbd68a/64220747673.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c873dcaf-a714-4442-ad55-4a9f5f1ace30/ices_003_class_b.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07613ee8-06a1-43cd-8876-a6ecca2caf1d/lowevoxorajunakor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4312/5917/files/496954646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9465/3594/files/airbnb_coupon_code_2020_australia.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_off00007e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E11 5340 bytes
SHA-256: bafd4f63a55939a9d8ea860f315e89a1af17829888fdc401ac3ad30a631f6f15
font_01_sfnt_off00009021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9021 10424 bytes
SHA-256: 08660ca7d5d7ce4a1d0ee9c44386d5e6c0a5ab82fc13cf3c2cc48e1a298e3bee

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