PDF malware analysis — malicious · 1821bff4a7a49c3a

MALICIOUS

PDF

59.6 KB Created: 2020-10-28 08:57:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: cb5b582a307b38d398d3bb58c617c6ed SHA-1: 2b4a2bb64fd3b1f981de99251d224a2b471ba00a SHA-256: 1821bff4a7a49c3a5f1a917bc47b499b23403fbb69d6759091ea02800a32798e

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, 'ggtraff.ru', which is disguised as an academic resource. This suggests a phishing or malware distribution attempt. The PDF also hosts a large number of external links, indicating it's part of a link farm designed to manipulate search engine results or distribute content. No scripts were extracted, but the presence of a malicious redirector and the link farm strategy are strong indicators of malicious intent.

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://ggtraff.ru/strik?keyword=ap+bio+chapter+48+reading+guide+answers In PDF document text
- https://cdn-cms.f-static.net/uploads/4367281/normal_5f888a645b63e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4376870/normal_5f964d037c949.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368494/normal_5f98fccb24ecf.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375541/normal_5f8ac13b44a55.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4376374/normal_5f8a30ce9796f.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/1/0483/5750/7235/files/motagekuxefikedu.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0497/3441/8586/files/marios_face_hd_unblocked.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0463/5639/8246/files/lutiganipuwopibixofot.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0481/9599/3754/files/89113387653.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0482/9259/3825/files/70490544225.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0479/3129/3863/files/kasugegovirojuruwubopi.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/8358/6977/files/mawutopefutevapa.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0483/5763/8307/files/info_konami_pes_2020_android_maintenance.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0266/9087/9667/files/implicit_differentiation_trig_worksheet.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0481/1869/4041/files/drift_trike_plans.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/8099/7269/files/rexozur.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/4200/4375/files/fluid_aquatics_deluxe_pool_noodle.pdfIn PDF document text
- https://s3.amazonaws.com/sabobenuwe/21146549767.pdfIn PDF document text
- https://s3.amazonaws.com/subud/86380035501.pdfIn PDF document text
- https://s3.amazonaws.com/ginutu/adsorption_equipment.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_off00008aee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8AEE	5808 bytes
SHA-256: `2a0f2716a38b6aeaab6d2b4a48c5aebf8a968e168f7ed11c1d45daddf431f681`
`font_01_sfnt_off00009ea2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9EA2	2048 bytes
SHA-256: `4bf11f4c6be75d81948f668266589190d37ddad2c534d5fe3da6d951fd618630`
`font_02_sfnt_off0000a784.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA784	10256 bytes
SHA-256: `0d9ce24872507ee7017efc4b85b34d9f4c36a60480cac56a5518139507e402d2`
`font_03_sfnt_off0000cade.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCADE	16196 bytes
SHA-256: `18337a07c9c44834262d20d91ee5da47d38261d0252b6cb37bc9cb74325b6b6a`

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