Malicious PDF — malware analysis report

Static analysis result for SHA-256 003479b9bb921ea5…

MALICIOUS

PDF

46.0 KB Created: 2020-10-16 18:19:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 37a77303b579e3f853d8d860fb2c58de SHA-1: bb12709826f7e1b5d2f4dc08d9346d7c0e1ba160 SHA-256: 003479b9bb921ea58d7a09e0ed1e0585601300d18d9e103c2dd6feb65680ebcf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links, many of which point to external resources, a technique often used for SEO manipulation or to host malicious content. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ggtraff.ru/123?keyword=astrologian+ffxiv+leveling+guide'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to redirect the user 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://ggtraff.ru/123?keyword=astrologian+ffxiv+leveling+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f87136c3b35e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365638/normal_5f87129464af1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366639/normal_5f872f8e9b873.pdfIn PDF document text
    • https://vibebivenef.weebly.com/uploads/1/3/1/4/131412032/7ab649c307f4d.pdfIn PDF document text
    • https://baletepo.weebly.com/uploads/1/3/0/7/130776023/5d91a7338b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367911/normal_5f88324c222c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366381/normal_5f874d0bc44fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_5f871ce6a8387.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5f88eed52f9e2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/05a80932-89c3-4e4d-9755-566251efaad9/57011016299.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef689a38-3fbd-4987-90bd-ef4906f1c78a/mapilowezakinevika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33852f97-0a55-462a-b9b6-7f89c7698f74/demawikodobofi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad97b806-9099-40a5-88a8-69d73c2d1997/14079813137.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70543423-9eeb-48b7-bb7b-db2b0e862cb4/21488224445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5596/2522/files/fegexebupopakar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9755/7654/files/electric_charge_reinforcement_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3866/5625/files/ragiromufigademop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4868/1120/files/kujosubororodaralubelasi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49d6ce28-5f47-47ff-93af-770202093938/79509011378.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eef1c201-c24b-4412-b576-f8adeb6399eb/45064496092.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d6756cc-24e4-4a41-8acd-967257fe1dd7/numilajokajizid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d8ee018-295e-4088-a9f1-b258c73f032e/10589421384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5130d74d-2ef0-4e94-b842-439b961ed3c0/wepiwuxifojepodelazu.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_off000075f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75F7 5192 bytes
SHA-256: e67c97cf6dcba65aff39d023e7d6ac3b11ef3ac11c7fe19b36499020351ef8cb
font_01_sfnt_off000087b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87B8 10092 bytes
SHA-256: c80814e05fcdb6c9e4f73e048ec0ddb39c95d57427dae180195540aec0107c56

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