PDF malware analysis — malicious · da760390c4ab389f

MALICIOUS

PDF

45.8 KB Created: 2020-10-09 15:50:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15

MD5: 45fd9c943af9f51d35bec213f5d2df0b SHA-1: 2a4bc5fa3aa4347cf574ea4ccd1d9e882ded1ab4 SHA-256: da760390c4ab389f38afbbf4cc2c1427da43d8c5d71da027c60f513fda0d51cf

134 Risk Score

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.
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://gettraff.ru/strik?keyword=fill+in+the+blank+game+questions In PDF document text
- https://site-1037141.mozfiles.com/files/1037141/palenazusazebatovusogem.pdfIn PDF document text
- https://site-1039201.mozfiles.com/files/1039201/42841924236.pdfIn PDF document text
- https://site-1039343.mozfiles.com/files/1039343/17898528.pdfIn PDF document text
- http://files.owlsmaryleonardchapter.org/uploads/1/3/0/7/130739504/xarasi.pdfIn PDF document text
- http://dukamobux.fleksone.com/uploads/1/3/0/7/130775880/7576690.pdfIn PDF document text
- http://dasudogox.shopcfs.com/uploads/1/3/1/6/131606620/1646402.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/cdfb0a92-61bf-4e0c-9d16-c49ed60ad59f/damasag.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b9865e8b-5ec9-4697-9628-216b06f58966/44657040379.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5c3b3b2a-469b-41b1-86ac-b58f44bc7999/91618218275.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000754f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x754F	5288 bytes
SHA-256: `16733dde4042be48a28f4900c23b9cee990e93b009442e09f6cf4e6ec5e2ce09`
`font_01_sfnt_off0000872b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x872B	10440 bytes
SHA-256: `fe474364c87bbe11ee10968ee75d37f1e40f6cd2c06dd4902cf2e491035bfbf7`

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