PDF malware analysis — malicious · a1beeb8f5e02b579

MALICIOUS

PDF

49.9 KB Created: 2020-10-16 13:40:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15

MD5: eaf28a2eaa39d97fe10f481def9d52ed SHA-1: 2ba028961e54fa271878e1e872741703b2e13e0c SHA-256: a1beeb8f5e02b579d101ec1c02f30f58a454008a42239d7c633bc0b4e3b6c538

194 Risk Score

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.
Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK

PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
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/123?keyword=layout+of+report+writing+pdf In PDF document text
- https://cdn-cms.f-static.net/uploads/4372384/normal_5f88977408e76.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365627/normal_5f88b9ce62889.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366637/normal_5f8729dd44c87.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367310/normal_5f8753eedb9d8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369657/normal_5f8860878f1a5.pdfIn PDF document text
- https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/7061675.pdfIn PDF document text
- https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/4056517.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/dce4f112-9f52-4bb9-ace2-7b67595775f1/nobekudu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/75bea171-81da-4089-b5d7-00ab86dc0c09/8824777464.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bd649f9b-dacb-4c8d-bd8a-bde1dbd3bc0a/98104032482.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/23f50842-a424-45da-a202-cf6a3d57d4c2/81442231829.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b1240c80-ce5f-4e57-9015-5fd2f0c45d29/56345770686.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0502/4573/0469/files/aa_step_2_worksheet_hazelden.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0484/0371/0104/files/33996980821.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/8266/2553/files/33411335239.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0486/2817/0917/files/firex_smoke_alarm_1182.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/9327/0429/files/84467541183.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_off000077e8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x77E8	5016 bytes
SHA-256: `e070ccbfa45d9a35c02a422626f56db929fcb97d0d08c240b535b275009fd036`
`font_01_sfnt_off0000891f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x891F	10296 bytes
SHA-256: `75c46fe07088e13482f502a42b5694dc36f812ef910a22bc39b9fa82cb859d32`
`font_02_sfnt_off0000ac47.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAC47	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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