PDF malware analysis — malicious · a3cd2493f00ab9d1

MALICIOUS

PDF

53.4 KB Created: 2020-10-06 10:00:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15

MD5: 1054b3700205316cf0169b06592e7268 SHA-1: d6a2e2872fc4d09ddf263a503a98a0d845d2c175 SHA-256: a3cd2493f00ab9d1ff73bd62ac1fdd44ba77c829e26da5a06cba468512afbe40

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/pify?keyword=skyrim+smithing+skill+guide In PDF document text
- http://mewis.t9corp.com/uploads/1/3/0/7/130775565/0c459.pdfIn PDF document text
- http://files.robertmazurekmd.com/uploads/1/3/0/7/130775055/7d43ca0aa00bfad.pdfIn PDF document text
- http://files.monicacarocci.com/uploads/1/3/1/8/131856565/52f5093ae.pdfIn PDF document text
- http://files.liveoakchildcarecenter.com/uploads/1/3/1/3/131379057/5faddcad7.pdfIn PDF document text
- http://files.splashcitystudios.com/uploads/1/3/1/4/131453615/4eb1ef3.pdfIn PDF document text
- https://site-1043808.mozfiles.com/files/1043808/xuduwajenolubux.pdfIn PDF document text
- https://site-1038531.mozfiles.com/files/1038531/zuriramolusiwekipelub.pdfIn PDF document text
- https://site-1036659.mozfiles.com/files/1036659/bumijuxu.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://cdn.shopify.com/s/files/1/0434/4525/6352/files/19156029088.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0481/4399/0939/files/gaboziletoxezov.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/1379/9064/files/sekunapasipamobufotipilab.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/7879/4920/files/2463023821.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0483/2316/6371/files/grow_cube_unblocked.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6de9b2af-b344-40ca-a720-fade1fb34741/xirozatawadixanat.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6400b057-8cae-41fc-ac7d-c9f9796a8024/legef.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cd384adc-a6ee-4161-8c41-cc137758e775/nawolunazuzu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b84fbd44-a0aa-485f-9d04-6cacd0d5d5fa/24930026367.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_off000084e7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x84E7	5068 bytes
SHA-256: `f9a86ec1b1bcf51fdca7fd2e814661b99b62a4e454029864475a080bbf679d3d`
`font_01_sfnt_off000095f1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x95F1	10628 bytes
SHA-256: `d8efd25348184600048bbcb8fb660729f994a08e83cc08ab0debd6f340a47714`
`font_02_sfnt_off0000ba08.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBA08	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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