PDF malware analysis — malicious · 5bba3a2f44039517

MALICIOUS

PDF

69.4 KB Created: 2020-10-17 07:44:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22

MD5: 6a95c90582da9d988c991d9546f8c865 SHA-1: f8edfd46ffb36c151c89bf91b5c0c5d35363d031 SHA-256: 5bba3a2f44039517b5606caf23afb059147e3e12297cc0fa99b727147a43ada4

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The PDF_SEO_LINK_FARM heuristic indicates the document is part of a larger link farm, likely for SEO manipulation or to distribute malicious content. No scripts were extracted, but the presence of a malicious redirector URL is a strong indicator of a phishing or malware distribution attempt.

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://gettraff.ru/strik?keyword=28+weeks+later+movie+download+in+hin In PDF document text
- https://cdn-cms.f-static.net/uploads/4366371/normal_5f872e75dd17b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365602/normal_5f8887e7a8717.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366949/normal_5f87323104837.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4377909/normal_5f8a00743dd9b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366000/normal_5f8a70b18e718.pdfIn PDF document text
- https://rutaluxunenore.weebly.com/uploads/1/3/0/7/130740368/nelimeraxumuxusufe.pdfIn PDF document text
- https://dubuzosokiboxof.weebly.com/uploads/1/3/1/1/131163723/takuluge.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4374532/normal_5f8a281b5dc44.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370319/normal_5f8975ece7339.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4371783/normal_5f8a1d069831a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368788/normal_5f89cb451adc3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368230/normal_5f87a39e84f19.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://cdn.shopify.com/s/files/1/0496/2228/6499/files/6_ps_del_marketing.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0492/7979/5357/files/tupac_poems_book_rose_grew_concrete.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0486/0536/4392/files/horse_racing_terms_in_spanish.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0499/8234/1280/files/92931356967.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5a443ea2-008a-4046-ad72-de5fabe92418/25995328434.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d3ba8d5c-4de5-4580-a08a-adea064baa54/v1_v2_v3_v4_v5.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3835d378-6f05-4038-b467-bf967f8c54c2/dokumilerikulis.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1008f0e5-34ed-4637-9b95-d794807c2e40/9297125554.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/de27ec8f-d979-4e37-b7ba-ea9479abc54d/jozawevikedagiruj.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/8451/3434/files/mountain_shadows_elementary_school_rating.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/7318/4678/files/79433180520.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0484/8454/8770/files/nuvagevoso.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000cfe6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCFE6	5512 bytes
SHA-256: `afaa7055e33aec0f9c9adb77fac96c2f247c878c7c58ab461e0b8794ad93db74`
`font_01_sfnt_off0000e27b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE27B	11176 bytes
SHA-256: `89a731fe1f769c91f87406888d7f99e8d6aace95643dd2268d3b7dccac7ab52e`

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