PDF malware analysis — malicious · d914dfa79fe938bc

MALICIOUS

PDF

64.7 KB Created: 2020-10-23 17:42:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25

MD5: d286f5907d963d472e62041756853148 SHA-1: 512e5e06b6dbe7a895e54423a8c7b5b12e8ade80 SHA-256: d914dfa79fe938bc90e0c1add9845e47ea32ab30c1bdd4818fab6eb3ade4b342

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://cctraff.ru/123?keyword=planes+de+hidratacion+en+pediatria+oms+pdf In PDF document text
- https://cdn-cms.f-static.net/uploads/4387233/normal_5f8cf14486a70.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370092/normal_5f923c3f4d97d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369182/normal_5f8f44ba45d70.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366987/normal_5f8bacd22563b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368222/normal_5f8f53ec2c499.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365545/normal_5f8c87aa3cdc8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369904/normal_5f88d877e2948.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://s3.amazonaws.com/pazifetanegapu/serie_a_calendario_setembro_download.pdfIn PDF document text
- https://s3.amazonaws.com/henghuili-files2/les_alphas_lecture.pdfIn PDF document text
- https://s3.amazonaws.com/lixasifasi/wugisolopegegiruv.pdfIn PDF document text
- https://s3.amazonaws.com/jamokaroxoj/25129838995.pdfIn PDF document text
- https://s3.amazonaws.com/defujo/grade_1_math_worksheets_free.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/31ad76f6-c321-49fa-84b9-072ff5d16f32/31591857614.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6d397337-e948-43ef-bc48-182d262d8063/41312677280.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0505/5270/1110/files/carrefour_pass_app_android.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0500/6871/7739/files/hum_aapke_hain_koun_ke_gane_bhejiye.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0476/4598/2886/files/63923872383.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4f13c9ea-65a9-45ff-9d2e-161d670bd359/39582245765.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1d2fec30-56a4-4e91-aa93-0c653c998ba7/dark_neighborhood_game.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8353580a-f875-457b-9910-83cf93c8cd25/navutanalogerujegisabanun.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_off0000aeaa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAEAA	5184 bytes
SHA-256: `c7575138f2113a824135146c2a120e30e904631315e2e7252e427bd987253116`
`font_01_sfnt_off0000c00c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC00C	11448 bytes
SHA-256: `11856c788d56a7cb3f32f9fa86791275cf0380722add52f639d9ba150e94d474`
`font_02_sfnt_off0000e53b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE53B	4324 bytes
SHA-256: `05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176`

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