PDF malware analysis — malicious · 3fa6b21e4a80a597

MALICIOUS

PDF

51.4 KB Created: 2020-10-28 21:18:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: a5ede71cbba7b5792001239b7c3f0bc9 SHA-1: 3df5198267acd86d584e4fac3a8f28c8508402b5 SHA-256: 3fa6b21e4a80a59765bb0aeab9b4c4540484f23553a26674eb5fd2dee863c6a8

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector infrastructure, which is a strong indicator of malicious intent. The document body, though heavily obfuscated, contains the URL 'https://cctraff.ru/aws?keyword=eccentricity+of+ellipse+calculator', suggesting a lure to a malicious site. The presence of numerous external PDF links, many pointing to Shopify, indicates a potential link farm or SEO manipulation tactic to distribute malicious 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://cctraff.ru/aws?keyword=eccentricity+of+ellipse+calculator In PDF document text
- https://jemajodelevo.weebly.com/uploads/1/3/4/3/134394711/depubonutu_gejejus_xewusixom.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4382187/normal_5f8b769454e24.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366055/normal_5f880e2231e47.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367007/normal_5f946e51445eb.pdfIn PDF document text
- https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/66dad5b4552c574.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4373240/normal_5f89ca9ac56b7.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/1/0434/6216/4644/files/77326346725.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0504/2064/6048/files/93549943228.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0495/7208/5926/files/driving_simulator_2020_mod_apk_unlimited_money.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0440/7027/3174/files/demezepixitodunew.pdfIn PDF document text
- https://s3.amazonaws.com/bevekizadoxuj/movefizebebexukuzasa.pdfIn PDF document text
- https://s3.amazonaws.com/dukajevo/xarowesofovugaf.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0501/9815/1343/files/lawigexanolubak.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0505/0518/7512/files/60271381034.pdfIn PDF document text
- https://s3.amazonaws.com/leguvefu/38723954149.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0484/0659/3696/files/download_mondly_language_premium_apk.pdfIn PDF document text
- https://s3.amazonaws.com/leguvefu/bodybuilding_diet_chart_in_hindi.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0496/1353/7429/files/how_old_is_wilbur_from_soothouse.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0495/5255/6184/files/makalah_pupuk_kompos.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0504/5020/2814/files/causative_exercises_bachillerato.pdfIn PDF document text
- https://s3.amazonaws.com/pazifetanegapu/que_es_anemia_microcitica_hipocromica.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/4714/7925/files/lifting_gear_inspection.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006efb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6EFB	5068 bytes
SHA-256: `a17505c6670dc57bf4849ec33fc05768c48800f1441cff73fa1a5024ab51d6c2`
`font_01_sfnt_off0000805b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x805B	13256 bytes
SHA-256: `a7d1c7ced8a670a2549a3fb6d162b8fd9a1107e5a024fa90c3c3b309d600697b`
`font_02_sfnt_off0000aaa2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAAA2	16080 bytes
SHA-256: `e3d583ca8131484f6b7e9991674a220a85ec8466745261d702706f92b0246cac`

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