PDF malware analysis — malicious · 55b77c2ff9aafa4e

MALICIOUS

PDF

59.2 KB Created: 2020-10-25 22:58:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02

MD5: 672cc06a1a7068017963e517c1078f65 SHA-1: 267c2025d01e989c1937eac88d1f163449e74c21 SHA-256: 55b77c2ff9aafa4ee0f771d21f0dedb6e0a8e26a5080a5e2ca5d8999a9c55d36

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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/pify?keyword=resistencia+eletrica+exercicios+pdf In PDF document text
- https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/xududev-ledavodu-jatulivarolaxe-bixebenal.pdfIn PDF document text
- https://deriwofapavuz.weebly.com/uploads/1/3/4/3/134311795/88da0f.pdfIn PDF document text
- https://xumogimunosu.weebly.com/uploads/1/3/1/6/131607683/6312747.pdfIn PDF document text
- https://pobezewimo.weebly.com/uploads/1/3/2/6/132681951/48794f1.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://s3.amazonaws.com/xurixado/adventure_stories_in_english_for_class_6.pdfIn PDF document text
- https://s3.amazonaws.com/wilugugo/toramadeda.pdfIn PDF document text
- https://s3.amazonaws.com/zirojopemup/dubusanipipoxigegojigol.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/fa4ca820-9f59-49b7-96af-04fce9df6c5b/60342124894.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3828aae4-8ca7-4b35-9459-3e6f5cea827c/33948151474.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0498/8410/2814/files/static_and_dynamic_analysis_in_economics.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0504/3050/9254/files/custom_spinner_in_android_studio.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0495/7208/5926/files/92711284398.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0439/3595/7147/files/potion_of_water_breathing_pathfinder.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/aa34664a-056d-4168-be3c-7d49e17acc2c/mewanisitirugelexanuto.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3235ffe8-5779-4fe2-830f-cd7a472b3ced/jesusujemegajusefu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/825d7230-9453-4c73-833d-4eeac49da345/gixibapuzulirapufobazad.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/64ea3800-485a-4cb5-9ad6-6e4d31c8347a/55373839476.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e6e0540b-8315-4818-a921-2a0fadb1845b/54223117812.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4ea5463f-2fd8-488a-a553-6a1994b64d0a/88362042357.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cae6c68d-0491-4825-8493-8460687353f2/derajidap.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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_005_off0000a6fe.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xA6FE	23716 bytes
SHA-256: `7d3f02cea5b8491c8eb569fe24cf77321eb5e318b603956d1a19dcef4af393f3`
`font_00_sfnt_off000070d6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x70D6	5012 bytes
SHA-256: `c5b1a9cde5cbc43e15c20fbbf8e542cfb6961021fb8d9ae96bd463b3bd6fb779`
`font_01_sfnt_off000081ed.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x81ED	10800 bytes
SHA-256: `6a0a7bb65b587669ab56660705bf486fcf2b7da7971d692165144627ac70eed2`
`font_03_sfnt_off0000d0f3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD0F3	4324 bytes
SHA-256: `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`

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