PDF malware analysis — malicious · 52b16ef425e21a6e

MALICIOUS

PDF

53.6 KB Created: 2020-10-26 21:33:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23

MD5: 20fd42238dba2de6abfcaa3e221cd3a8 SHA-1: 1ffc4d131c96c9ff63e76c8d69832c6260c649ce SHA-256: 52b16ef425e21a6e8f6c36a97297bc0176b3ad015a52ebbece8b9c254c6bb8f0

194 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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.
Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK

PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
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.me/123?keyword=elmhurst+district+205+employment In PDF document text
- https://dixozetazexode.weebly.com/uploads/1/3/4/4/134472526/nutenelepesi.pdfIn PDF document text
- https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/7a015d.pdfIn PDF document text
- https://viziwebaf.weebly.com/uploads/1/3/3/9/133999863/jidoxuxodux-lamixizev-majub.pdfIn PDF document text
- https://latenenagizogip.weebly.com/uploads/1/3/2/6/132696064/1309028.pdfIn PDF document text
- https://zuragani.weebly.com/uploads/1/3/1/4/131438510/501896.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/bisute/juwetudad.pdfIn PDF document text
- https://s3.amazonaws.com/regovadeje/small_split_word.pdfIn PDF document text
- https://s3.amazonaws.com/memul/95666324696.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3279a2ce-a611-4e8c-a9ef-b355ddbd86c6/9108395083.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/31b33238-0d2d-4ec1-b4a2-8eae0f5742bc/kenorixu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a22ddc8a-3505-4202-8f2e-5902de1e5c46/11748239871.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f0d12685-d6b6-4052-a25a-3a0267065329/microsoft_logo_colors.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d88891da-5ece-429f-bc0c-30e99a2fece4/gejagunojevakujawosoxogob.pdfIn PDF document text
- https://s3.amazonaws.com/jotizifime/78379051987.pdfIn PDF document text
- https://s3.amazonaws.com/zuxadol/holt_sociology_textbook.pdfIn PDF document text
- https://s3.amazonaws.com/henghuili-files/xukekijikamenumipimuwezoj.pdfIn PDF document text
- https://s3.amazonaws.com/juliziwojatige/vobavibebifetilozawibejo.pdfIn PDF document text
- https://s3.amazonaws.com/bulozor/bardo_thodol_italiano.pdfIn PDF document text
- https://s3.amazonaws.com/bokofapig/weigh_batching_of_concrete.pdfIn PDF document text
- https://s3.amazonaws.com/mizeteb/scrabble_2_letter_words_list.pdfIn PDF document text
- https://s3.amazonaws.com/henghuili-files/vovixefojanigematoxopav.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_off00005d7c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5D7C	5440 bytes
SHA-256: `6f20a7d69e26631650ecbdc26f49a02d7bced12d0cb780019b1b66b8586bf2f3`
`font_01_sfnt_off00006fdb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6FDB	14672 bytes
SHA-256: `0ec4783f0f2cdac683069bf1f1aa68c910d7ae0f50a4eadf9aa2ed9852790d21`
`font_02_sfnt_off00009dc7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9DC7	18440 bytes
SHA-256: `d4e42af8850d6b37ee72c7849dd16f82ed058db0e50aee1ff8bb9469a86c5759`
`font_03_sfnt_off0000ba9e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBA9E	4324 bytes
SHA-256: `7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71`

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