PDF malware analysis — malicious · 5a068c5821e77e2c

MALICIOUS

PDF

42.7 KB Created: 2020-11-03 02:45:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d276340078b74dabdd6ef1b77dc87a69 SHA-1: d6e8f3deab38ec6e0f03ac82c95bdcc9b88d33ed SHA-256: 5a068c5821e77e2c3dbd3621721b7ec5e0c69dfc39f4c35cdb28079b1d5509cc

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by an ML classifier and contains numerous links to external PDFs, indicating it is part of a link farm designed to manipulate search engine results. One of the primary links directs to a known malicious redirector infrastructure, suggesting an attempt to lead users to harmful content. No scripts were extracted, and the document body is heavily obfuscated, making it difficult to determine a more specific attack pattern beyond link manipulation.

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/aws?keyword=into+space+3+hacked+unblocked+games
- https://cdn-cms.f-static.net/uploads/4405638/normal_5f98407fae520.pdf
- https://xazaguzomolak.weebly.com/uploads/1/3/4/3/134375957/nunir.pdf
- https://kosigejobawazi.weebly.com/uploads/1/3/4/3/134315380/furur.pdf
- https://raralulewuk.weebly.com/uploads/1/3/4/4/134478892/81075d1334c.pdf
- https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/65edf5c0.pdf
- https://cdn-cms.f-static.net/uploads/4389394/normal_5f8d8c58bb186.pdf
- https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/liwefazawuzalal-dewatezata-wetezovefo-zimejiwu.pdf
- https://xumabilere.weebly.com/uploads/1/3/1/1/131163638/f6115240c1cf.pdf
- https://xemivigezeb.weebly.com/uploads/1/3/4/4/134481563/5871760.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0430/2562/9335/files/texas_mft_jurisprudence_exam_study_guide.pdf
- https://s3.amazonaws.com/medetopuwofetut/rackspace_webmail_portal.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006666.bin` `fcab0e7b52c63d9ae4a771bb8c51ab533aef37aadad62d468299158b7045b765`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6666	5696 bytes
`font_01_sfnt_off0000799a.bin` `82801d9a570c2fbcb1039557190979e9ff9a09a079a6b77afcfff9895706c754`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x799A	10788 bytes

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