PDF malware analysis — malicious · 29c6a21b93e805dc

MALICIOUS

PDF

64.0 KB Created: 2020-10-10 11:46:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22

MD5: ad1dccada2e9e92299822c34b806312a SHA-1: cf660c624ad01c558067a21a41811ec1156e02b3 SHA-256: 29c6a21b93e805dc5f438b19b3e336182e6bd9a8798011e355942a6eb8971fb4

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, https://gettraff.ru/strik?keyword=miracles+in+december, which is likely used to distribute further malicious content or phish for user credentials. The document also functions as a link farm, pointing to numerous other PDFs hosted on disposable or benign-looking domains, suggesting an attempt to manipulate search engine results or distribute content widely. The ML classifier strongly indicated maliciousness.

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.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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=miracles+in+december In PDF document text
- https://site-1037111.mozfiles.com/files/1037111/48730907274.pdfIn PDF document text
- https://site-1038703.mozfiles.com/files/1038703/xoxutobajugapekajeba.pdfIn PDF document text
- https://site-1036894.mozfiles.com/files/1036894/95195557601.pdfIn PDF document text
- https://site-1043666.mozfiles.com/files/1043666/86366641901.pdfIn PDF document text
- http://files.rocktron.com/uploads/1/3/1/4/131453823/5f195.pdfIn PDF document text
- http://files.oxnardea.org/uploads/1/3/2/7/132740408/5ebd73748b1ac.pdfIn PDF document text
- http://files.lilacandlaceco.com/uploads/1/3/1/4/131438162/72a2c5dd38.pdfIn PDF document text
- http://rawime.sheepprogram.com/uploads/1/3/0/7/130776334/1322385.pdfIn PDF document text
- http://benefodo.peaceloveandhairsalon.com/uploads/1/3/1/8/131856127/3b7cf4ab80f47.pdfIn PDF document text
- https://site-1038313.mozfiles.com/files/1038313/36465013672.pdfIn PDF document text
- https://site-1036821.mozfiles.com/files/1036821/68804643874.pdfIn PDF document text
- https://site-1037149.mozfiles.com/files/1037149/wezibuzetutedejenun.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/1/0434/6871/8232/files/61159096195.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0488/3467/4853/files/40104614545.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0478/6352/9638/files/digestion_of_carbohydrates_in_small_intestine.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0482/2384/6554/files/dowiz.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/5638/9528/files/dna_replication_concept_map_answers.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00007f16.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7F16	17948 bytes
SHA-256: `d70ad3028b95e40d5bd310a745f83268e52698f372d4524cfc1872791f340bed`
`font_01_sfnt_off0000b78e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB78E	5232 bytes
SHA-256: `86f01ef9f77908f2eff9c7445c87f0d8333401e7973d642cd91f1c889367620e`
`font_02_sfnt_off0000c938.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC938	13184 bytes
SHA-256: `0d63e13d0f23bce72f2b5a5832e9cc209b35a5585d8e80209204757b966e4196`

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