PDF malware analysis — malicious · a3158ff2f3c356b6

MALICIOUS

PDF

66.6 KB Created: 2020-10-27 13:47:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31

MD5: 7c0078496acbcb23941ed6c0ad71de2c SHA-1: 5eba670acfca10097adb55441e07fdf4300490e9 SHA-256: a3158ff2f3c356b6c5cf102616a6ccaede46608c0789919e0ba038c1297886c8

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://gettraff.ru/strik?keyword=bottle+rocket+fin+size'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, some of which are to benign files but others are unknown. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL and several other URLs, suggesting an attempt to lure users to external, potentially 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://gettraff.ru/strik?keyword=bottle+rocket+fin+size In PDF document text
- https://cdn-cms.f-static.net/uploads/4382638/normal_5f9256d775a0b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4390661/normal_5f91a7e006219.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370266/normal_5f966cd07a133.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4374013/normal_5f8b8dffb8813.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369161/normal_5f8ecdd82525f.pdfIn PDF document text
- https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/8600574.pdfIn PDF document text
- https://vufevilasok.weebly.com/uploads/1/3/4/3/134314299/xajatumowilozosiviri.pdfIn PDF document text
- https://pewoxunoxosizix.weebly.com/uploads/1/3/4/3/134318290/8751128.pdfIn PDF document text
- https://kasukironumasex.weebly.com/uploads/1/3/1/4/131454791/metekesalaran-gimigowirokege-gavirepivedoz-wuwugemirokuz.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370777/normal_5f89d8672dd79.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368962/normal_5f8a38d040025.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4385869/normal_5f8fa81392024.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375340/normal_5f8e03a333d66.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/henghuili-files/body_beast_workout_guide.pdfIn PDF document text
- https://s3.amazonaws.com/nupotukig/lasaponoxemim.pdfIn PDF document text
- https://s3.amazonaws.com/figugipopar/35136169979.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f66436ce-a5e3-4934-9f15-a8204c4d8ce0/yugioh_legacy_of_the_duelist_challen.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6198b295-7da8-4a11-9353-13554e080206/scantron_grading_machine_price.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/915b98c9-b8ae-4cb9-b29c-dbb85c8d10fc/aegis_x_vape_manual.pdfIn PDF document text
- https://s3.amazonaws.com/jamokaroxoj/vujifinefekonugaseralazow.pdfIn PDF document text
- https://s3.amazonaws.com/pazifetanegapu/dagopeg.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
- https://savannah.gnu.org/projects/freefont/In PDF document text
- http://www.gnu.org/licenses/In PDF document text
- http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000a8b9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA8B9	6424 bytes
SHA-256: `50759c40df67ec181331d37bc16259f4db20c39507a2c7d18444f96545433770`
`font_01_sfnt_off0000b899.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB899	4828 bytes
SHA-256: `1afb5879becc928f953da06b13c19b800d5285efd19f6914c2fac1a46d88daef`
`font_02_sfnt_off0000c918.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC918	2744 bytes
SHA-256: `2d32c9159abf1c8fa368fcddd56a9d1610abcd407fc611f931ef4964c80bd0e2`
`font_03_sfnt_off0000d51b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD51B	11956 bytes
SHA-256: `556c4798456f0db7a59d77e40fba137a4d064b32dda8508e057b0fa1116b5e98`

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