PDF malware analysis — malicious · 9621b8ca0fe05950

MALICIOUS

PDF

59.0 KB Created: 2020-10-27 11:41:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27

MD5: b7e258ebc47f1e13ba8823b0606c8033 SHA-1: 7dcce7f97f2487370b06ad82b67820f1684ca718 SHA-256: 9621b8ca0fe059506bfae1c73d052a8003f7f428e36b1e8549cdb7ca86605764

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One of the primary links directs to a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a malicious intent to redirect users to harmful content.

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=astro+jinjin+tattoo In PDF document text
- https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/8404899.pdfIn PDF document text
- https://samomalekadoj.weebly.com/uploads/1/3/1/4/131438786/bikatarefa.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387229/normal_5f91ad1af10bc.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368952/normal_5f8b4b7232fd5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366027/normal_5f86fb04c9e4c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4388406/normal_5f8d8e9e282c6.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/05ebcab1-8406-46e9-bed6-cad8c67c5add/33019769415.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/01d83aba-a694-466f-bc68-2f225c785b7b/mesomirivapozupuduvesaza.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f1db0a6c-d634-4ba7-b991-fddd4d36b499/biografia_de_caonabo_javier_castillo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/eb816daa-4720-41c0-a9f6-2537b27aadc5/75813421708.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/28ef8695-6cb4-4fb7-b487-6e914b7e1206/nokevokuv.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0439/3874/2440/files/82605045760.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0500/5213/7128/files/telecharger_whatsapp_business_apk.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0484/7766/7482/files/nikekog.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0438/1966/3522/files/tofewol.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0497/9408/9113/files/harvard_rejection_letter_meme.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0484/6931/1650/files/disabling_facebook_notifications_android.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0504/6704/5556/files/sepezoguxovenisomoxal.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/8651/9195/files/19080692195.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0479/6153/8727/files/34190682879.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/3357/5075/files/28927161098.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0481/7213/8663/files/59518216464.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000079a2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x79A2	3408 bytes
SHA-256: `c735857bdb5745901049728a9d5f658a24a2bcc052b9cf46f0c9e62b8a6a3eb6`
`font_01_sfnt_off000085d0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x85D0	4712 bytes
SHA-256: `4845046db993ba77230cf4560d4c450ad4ad773ca4e3c57bafb4c35250885634`
`font_02_sfnt_off000095e3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x95E3	11280 bytes
SHA-256: `267e419d2fcb6326168aebd6e3b1dc715ac4b472df87560eee2aeaada0274ba5`
`font_03_sfnt_off0000bc6c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBC6C	19200 bytes
SHA-256: `ae641a4c271d1c097f536576b2021236acd608b43e141e69006149f8cd87083f`

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