PDF malware analysis — malicious · eb364f3c01179d6b

MALICIOUS

PDF

49.7 KB Created: 2020-10-16 05:39:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: d090e70fe8cf11e80b7b2b958b2ab48c SHA-1: f015b3d4a0874e0bf29297211788fe3203510b1b SHA-256: eb364f3c01179d6bddb55aa78e80a03778dd2b9600a2c87367b052280a5b232c

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF was flagged for containing links to known malicious redirector infrastructure and a large number of external PDF links, suggesting a link farm. The primary malicious URL identified is 'https://ggtraff.ru/123?keyword=the+entertainer+guitar+richard+smith+pdf'. While the document body contains garbled text, the presence of these links strongly indicates an attempt to lure users to malicious sites. The ML classifier also provided a high confidence score for maliciousness.

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=the+entertainer+guitar+richard+smith+pdf In PDF document text
- https://cdn-cms.f-static.net/uploads/4368985/normal_5f87dcfabe344.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366965/normal_5f874fd70429f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365649/normal_5f87063a4568e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366309/normal_5f8727127f599.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366661/normal_5f880e0e018d8.pdfIn PDF document text
- https://naroxelilokatud.weebly.com/uploads/1/3/1/3/131384214/fa4af31e1db.pdfIn PDF document text
- https://nanorobudilason.weebly.com/uploads/1/3/0/7/130775181/ruvafegebipe.pdfIn PDF document text
- https://vozutadisifik.weebly.com/uploads/1/3/1/4/131483249/ec8faee.pdfIn PDF document text
- https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/kirorafagosox.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/f7ef7c94-cf4d-4e07-b163-87c1169ad003/varakonazefepax.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/02fb6cf4-45f5-4cf5-ab37-460722905367/gimegiwa.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8df187b0-99fd-41ef-a2e3-504fac37fc55/lowonoxusowixilinisomu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3ac4a84b-ee5c-42ce-871c-2e43df608b83/61464712934.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/90f49954-5817-41a5-bf07-b0b03a040c98/59103252710.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f8e9338c-c3c6-4fc7-bfbf-b161ab8f126c/wobokoregimijoraxojole.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/30d7a545-0567-45a0-b030-df7786e8691b/42469910839.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/311c576a-8425-4feb-a182-5d35a9cb436a/tejufepikeridobejexetoz.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cb702e27-7b57-4b79-aa6c-be77a5ad3da4/68605698222.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cf133d4a-9c21-4142-bba3-6edfebcd5e12/viralogonivosuzoronazakon.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/54953e83-3c66-4575-ad54-69d2b50378ad/nivokesawizud.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d17fd615-cf99-4840-965a-26a14df90290/vifipezajotiwuzitik.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/41ea1f66-e1fb-4ab2-87fe-c073627df786/1253185090.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c1bd281e-d41d-4542-8f99-23783a03d251/10289894235.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ca2b6d11-fc6b-4e79-8a76-e2f2bd53fa15/xapifif.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b0bf5364-f6ef-439e-9be4-9e79850a0648/4240659802.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bd821804-9f5a-4559-b91e-9306acc17509/felanuji.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005da0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5DA0	5488 bytes
SHA-256: `4f957e3502b27783b7a202d87bc2a8e2214f55c8c3a2d41d9b5f584003c34fd1`
`font_01_sfnt_off00007016.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7016	14472 bytes
SHA-256: `b806a1bf50dc40d28ecc72e8be52a8d5b7cbeb0f9ef8ceade7cfff4c8e055708`
`font_02_sfnt_off00009d21.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9D21	17956 bytes
SHA-256: `30f18cefe09041207b05eb0bdc387bd386971d1dbc050e736ab75111398bc588`

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