PDF malware analysis — malicious · d1cd6c4420f3ea04

MALICIOUS

PDF

47.6 KB Created: 2020-10-26 06:33:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: c42aa78fa9ab8d429649cec2b76a1c57 SHA-1: 88e4c55c4ba9589e0cd9389cab0d4f3512dbdeaa SHA-256: d1cd6c4420f3ea04ba08b738b7cc3b3f6023518a8cce7647c07c4f616679cef7

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector heuristic. The presence of numerous other PDF links suggests a link farm or SEO poisoning attempt to distribute malicious content. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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://ttraff.ru/123?keyword=improper+fraction+on+a+number+line+worksheet In PDF document text
- https://cdn-cms.f-static.net/uploads/4369782/normal_5f8c9dd8427fd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4389370/normal_5f95f36476731.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4385412/normal_5f8fc14560879.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4388050/normal_5f8d1a84377eb.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/e82fcfdc-5029-4c4e-bc33-eea0d47a6be6/judikozuwaravagakobujo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/93d897a9-08a5-4f5a-9819-276205452972/26455528113.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ca5bc0b0-6f02-43fc-a9b7-54ffe73d32c6/lanoxezawujisajasize.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/52666c15-e59d-417c-b928-1bbc1ce0bb07/6225998646.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cff8e9f8-3902-4012-b848-f0b81a0d6efa/widititevi.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0500/4460/0491/files/privacy_hider_app_apk_download.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0464/2507/9960/files/83733604052.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0505/2809/2360/files/60677286591.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0462/3650/0128/files/georgia_durable_power_of_attorney.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0481/6093/1991/files/20_amino_acids_list.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/9744/6818/files/replacement_ceiling_fan_blades_hunter.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0495/9672/7460/files/wakolaniwefalisivubugofe.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0482/1594/9466/files/tubiwoboduniz.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0496/8244/8541/files/linksys_wrt32x_android_app.pdfIn PDF document text
- https://s3.amazonaws.com/mijedusovineti/biblia_reina_valera_1960_espaol.pdfIn PDF document text
- https://s3.amazonaws.com/pazifetanegapu/65887572735.pdfIn PDF document text
- https://s3.amazonaws.com/baritexovopa/rivolarinixesij.pdfIn PDF document text
- https://s3.amazonaws.com/henghuili-files2/bhagavad_gita_in_kannada_format.pdfIn PDF document text
- https://s3.amazonaws.com/leguvefu/16151301970.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_off00006507.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6507	5488 bytes
SHA-256: `fa1d4770ad7ad49efd9a8e37b71cdca95d3ccbce8adf300e7fbfff8b4f8fcadd`
`font_01_sfnt_off0000778d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x778D	10548 bytes
SHA-256: `22b478919bc31627d984e15994d02956f8a24461f7ce664f47fb5df4a19a9982`
`font_02_sfnt_off00009b94.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9B94	16092 bytes
SHA-256: `ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073`

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