PDF malware analysis — malicious · 78077321c19af287

MALICIOUS

PDF

53.9 KB Created: 2020-10-03 01:08:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: afe00f91a3cf32d270548365eb62966b SHA-1: cbeb7d315ec22ee557e9bcea34f18a77b03895da SHA-256: 78077321c19af2879aa28b3b718b3746eecffaa5733948cd4d97d5042d1097a6

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of links to external PDF files hosted on disposable domains, indicative of a link farm. One of the embedded URLs, 'https://ttraff.link/pify?keyword=meaning+of+marriage+study+guide', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting the primary purpose is to redirect users to malicious infrastructure.

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.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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.link/pify?keyword=meaning+of+marriage+study+guide In PDF document text
- http://files.engsamarbete.org/uploads/1/3/2/6/132695278/bevorati.pdfIn PDF document text
- http://files.andrewbishopmd.com/uploads/1/3/1/1/131163738/9622605.pdfIn PDF document text
- http://miled.rongoodine.com/uploads/1/3/1/0/131070356/mamumu.pdfIn PDF document text
- http://files.orchardstreetmusic.uk/uploads/1/3/2/6/132682530/juximazixuwo.pdfIn PDF document text
- http://suleki.millard-and-kleinsteuber-histories.com/uploads/1/3/1/6/131636725/1620254.pdfIn PDF document text
- http://files.metalwitchh.com/uploads/1/3/1/4/131406202/a70b4b.pdfIn PDF document text
- http://vepunuz.grandpadachshund.com/uploads/1/3/2/7/132740412/mikekijimud_bureze_wupoje.pdfIn PDF document text
- http://mepufilo.ogdenmarketing.com/uploads/1/3/0/7/130775505/1089948.pdfIn PDF document text
- https://site-1037044.mozfiles.com/files/1037044/25816108192.pdfIn PDF document text
- https://site-1038357.mozfiles.com/files/1038357/31209597146.pdfIn PDF document text
- https://site-1040329.mozfiles.com/files/1040329/bifotilijamenubot.pdfIn PDF document text
- https://site-1036691.mozfiles.com/files/1036691/21086410140.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/1/0430/3981/7890/files/99753555303.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/8852/7014/files/73418075493.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0439/5322/5886/files/24873498455.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/1171/8820/files/titanic_watch_online_fmovies.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0500/1153/7558/files/patagonia_powder_bowl_jacket_insulated.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_off000086c1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x86C1	5184 bytes
SHA-256: `b44019f268796003cba7b727e665a1ab24ff6f41b40f34f1e74604351550862d`
`font_01_sfnt_off00009854.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9854	10420 bytes
SHA-256: `91107647e74c178be6e4e8353a879a162717e4af2fede7332ebe0c944360b4d1`
`font_02_sfnt_off0000bbf7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBBF7	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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