PDF malware analysis — malicious · 05a4d398ff20707e

MALICIOUS

PDF

46.0 KB Created: 2020-10-16 22:47:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15

MD5: a622bf6890c5e2eab6533799f039d716 SHA-1: ec64997be423d59f973f00efa13e186959848e3d SHA-256: 05a4d398ff20707e05a2bd723263d6f584e881699460d33c437271d569d50edc

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://cctraff.ru/strik?keyword=dllkit+pro+license+key In PDF document text
- https://cdn-cms.f-static.net/uploads/4365539/normal_5f87169124ad8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367290/normal_5f89cee7dd4ed.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367644/normal_5f874b1443238.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375342/normal_5f89e19f1e103.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368763/normal_5f89d3af50c76.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366365/normal_5f87b71a48e76.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366011/normal_5f870847249eb.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365602/normal_5f8729cce565f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368956/normal_5f88a14fb797b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4376098/normal_5f89a3a322142.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368494/normal_5f887463bfa10.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/1/0432/1578/2048/files/necromancer_guide_dnd_5e.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0498/3455/7602/files/35154118184.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0483/9492/8296/files/longwood_lake_nj_cabin_for_sale.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0482/8846/5051/files/hening_elementary_school.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/58ef7d08-70a3-40c5-9833-544558203043/zovemogapaxefava.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d97638bc-40aa-4321-88db-43316d09f62e/duxaguxi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/811ba23a-8774-4672-b7b2-696188b6b2fa/27703905486.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ec175a55-f376-44f2-98c2-c888fd3f1852/tisekilejelonaligozasoxo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c33ce829-40ef-4412-9c97-e56fc3685864/marzia_prince_workout.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/892ebf95-4386-42c6-911e-44459abad626/70325196669.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ceca782e-5530-4fe4-86cd-89e3a50bda19/20224691828.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1e4ebb4c-aa55-4cc4-ae24-9f646702809f/popanuxikutiwes.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/679cd3d2-db3c-4c11-92dc-145c51d8115f/neterewanago.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_off000075c9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x75C9	4880 bytes
SHA-256: `2163eac58199455ad7688597205dbf8b6245792850d466b8040c5f57e51a470a`
`font_01_sfnt_off0000867e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x867E	10700 bytes
SHA-256: `0cbea728b66c0e2f6efb201a7e9dce00ae8114d940598adba866d2a68a1af0eb`

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