PDF malware analysis — malicious · 37276e2da1271d31

MALICIOUS

PDF

44.5 KB Created: 2020-10-28 00:34:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: 83a3ec0c0952f9bd455d85ffc450835f SHA-1: 24f62aba8a747c69cde3a139ef93d1dba45a4991 SHA-256: 37276e2da1271d316843b9c6e00048e87ef5055bdfaec3df6e7034e05dfde9d3

162 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to external PDF files hosted on Weebly, suggesting a link farm or SEO spam campaign. One embedded URL, 'https://gettraff.ru/123?keyword=weather+pine+point+scarborough+me', is flagged as a malicious redirector. The presence of a 'download button' lure further supports the malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity.

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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/123?keyword=weather+pine+point+scarborough+me In PDF document text
- https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/jorapimara-bekule.pdfIn PDF document text
- https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/8251036.pdfIn PDF document text
- https://lusukukupesakub.weebly.com/uploads/1/3/0/8/130815137/dejik_pixerigo_wuvotaje_xukujo.pdfIn PDF document text
- https://nujidigazinuwag.weebly.com/uploads/1/3/4/3/134318548/2510744.pdfIn PDF document text
- https://jikeberu.weebly.com/uploads/1/3/1/8/131857846/pererasunob_bixawuzapag_latikopu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4389585/normal_5f958f335b2d1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368494/normal_5f8cbb2f6bdca.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4381988/normal_5f9213b67b001.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379973/normal_5f93b1230647b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365642/normal_5f870c8541ba2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380213/normal_5f98081d2e6ab.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4416512/normal_5f956a217c023.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://uploads.strikinglycdn.com/files/c0838bb3-4aeb-4c48-8516-8cbdd2ecfac4/56603199661.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e6f110d1-7ac6-4c45-8913-60f3fedbd7f4/94469031854.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2f26ec99-1a37-4c6a-9dfe-a048b0ad5bc1/dikukosurazonewesugutu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8d2adcd0-35c9-440a-ba5c-e51e94d35eae/kagolororisubifatebo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a60e1f6e-8ba9-42c0-aab7-1cf51e5dd26a/baroreceptors_are_located_in_the_novella.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a3f905b9-ac00-4304-acf1-0505f12acdcc/38762072963.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/65ec22b3-f445-48cd-aee1-d691506f629f/walevenibapulezenujilu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7a041f9b-e137-44fc-b206-97ece488af1f/49768343888.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bd32658b-37cd-49ea-8b12-92bb37c56a5a/witorasavuribefuwitixe.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b215d26c-7d08-46e4-b1c9-656e469cd1bb/zuvapugufomugufisuvadesan.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5e48d74c-3f5a-41bb-bc20-6f9c2bbc6c60/32186131320.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d114b766-2d73-4c84-911c-8c5c23aff2f0/the_hour_that_changes_the_world_east.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9c51bc3a-db76-4256-a29c-812cb9cdc590/is_722_a_low_credit_score.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_off00006205.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6205	5352 bytes
SHA-256: `ea111973972b2ec5c17c893d6189914d3d04b33c952cbde4b5e9d7fc4e811ff8`
`font_01_sfnt_off0000740d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x740D	10020 bytes
SHA-256: `6145475abd22d1a4a0641d16d3962748cb9e952d11844172c6de7293971b9254`
`font_02_sfnt_off00009657.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9657	4324 bytes
SHA-256: `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`

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