PDF malware analysis — malicious · 9eaa16f82713b62e

MALICIOUS

PDF

45.0 KB Created: 2020-10-17 00:22:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15

MD5: d5b41912a7e4d8511bc86d2151b55e5d SHA-1: 66bf1cbec9b8a367aef1d7e30a950dfed90c38c1 SHA-256: 9eaa16f82713b62e4995e3dccb2592b2c37ed8e42a088c1f52dfa32f9e2ddf6d

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=mixtures+worksheet+middle+school In PDF document text
- https://cdn-cms.f-static.net/uploads/4374533/normal_5f8a0e7f22466.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368747/normal_5f8a0e31d726a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4371498/normal_5f8a0a1951b36.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367646/normal_5f8802695828e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365562/normal_5f8714a9dc07c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366661/normal_5f889cfe41e28.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366384/normal_5f872b89dd72a.pdfIn PDF document text
- https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/5d6f2da.pdfIn PDF document text
- https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/1813217.pdfIn PDF document text
- https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/belapigojat.pdfIn PDF document text
- https://nasinapalu.weebly.com/uploads/1/3/0/7/130739684/2011601.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370309/normal_5f8a0c165b35a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369915/normal_5f88c31c59427.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366032/normal_5f875c0326a4a.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/c4f04a74-e49f-4b1a-bed1-d723dd5f72ac/mosunuzox.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7fdd4f5e-33b0-49d3-9d73-028ea9a10bdb/15014169882.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/08aa3328-68a1-47d6-bfb6-be59d14ee728/niveaux_avec_des_araignes_farm_hero.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8bd9e1d4-8cae-4039-a399-e19d4c7c9bda/64288092083.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/365a1bde-467f-454b-8694-dca9b0af1007/sea_of_thieves_all_swords.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0493/4126/8127/files/modern_day_renaissance_man_now.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/3510/7233/files/compound_shapes_worksheet_answer_key_math-aids.com.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0499/7290/4088/files/23845965273.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/7090/5750/files/epiphone_les_paul_junior_humbucker.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0481/7233/5255/files/pibolijudowokepulutap.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_off0000718a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x718A	5200 bytes
SHA-256: `eb2e337ce15cb482a2ee94985ac1c6d1cd9f3ed15c19597f9633327aaaee239c`
`font_01_sfnt_off00008332.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8332	10228 bytes
SHA-256: `16faab5c7cb79949e84caa6ee9052698029db3c52439e68ab25b0cd19d0400ce`

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