PDF malware analysis — malicious · 3b70af45ccc7e502

MALICIOUS

PDF

46.0 KB Created: 2020-10-25 09:05:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23

MD5: d0045dfff157d8d0b470212ad4bf45cd SHA-1: ca3054e0e64bf62eeb4088f1d704e7d5ae66044b SHA-256: 3b70af45ccc7e5029da87416654da8f2e96f061b4bd9bb6a15f6ce40e6aaa1c0

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://ttraff.me/123?keyword=du+recorder+apk+download+version In PDF document text
- https://cdn-cms.f-static.net/uploads/4366947/normal_5f8998a21851c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366028/normal_5f876113620b4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366637/normal_5f87803947b96.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369769/normal_5f8a902fdc76c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375896/normal_5f92625e978c5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367680/normal_5f89a19f7d177.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379229/normal_5f926e07c7a48.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387716/normal_5f8e8b4ee48e1.pdfIn PDF document text
- https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/lijariguzimuda.pdfIn PDF document text
- https://mojipolizu.weebly.com/uploads/1/3/4/3/134318612/bb03314b1a3f.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://cdn.shopify.com/s/files/1/0495/6150/1848/files/65436735966.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0438/1225/7952/files/36915653771.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0499/8837/0582/files/50213711879.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d52e914f-d9ce-43d1-9d3a-5fcec10f5ad7/14255705076.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a1077806-612d-4d2b-828b-6bf4d1745b0a/93187011076.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/fd09594f-4795-47ff-8662-4f088638bf5e/delujovaberibagas.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/71578d1a-5fb6-42a5-ae5d-f1a43e2635e4/9058201708.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/da856bdd-164a-42db-a3d2-4fd3b52af334/73932867978.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
- https://savannah.gnu.org/projects/freefont/In PDF document text
- http://www.gnu.org/licenses/In PDF document text
- http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00004cba.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4CBA	6588 bytes
SHA-256: `fa72874b8c381873b432d3b5cea9ecddba20f04e8e1c9face7d560df1136061a`
`font_01_sfnt_off00005d34.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5D34	5284 bytes
SHA-256: `ebc1ebb0c2a3dddaca998b80cf23e042a4fa6eb8ee506df1a1ae7aac67f5ee44`
`font_02_sfnt_off00006f58.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6F58	11340 bytes
SHA-256: `4f14e9359bd1f86a1743ef6ad3967f38d4497f20683fe802eca8af650e715b5c`
`font_03_sfnt_off0000954b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x954B	16168 bytes
SHA-256: `8c1e3298cb301b6aa2c2aeff0a89e1cafee6626e56d5ffa98ad52a7598c40df9`

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