PDF malware analysis — malicious · 1f26c4cec81b4354

MALICIOUS

PDF

48.6 KB Created: 2020-10-17 21:41:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22

MD5: b076d06280eda492abb488457a588de0 SHA-1: 680c2057a778b85c3f7cf7d0579481683bab5a05 SHA-256: 1f26c4cec81b4354b811b057d39830234a5ae66facc61f9467c93491e96e466e

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document functions as a link farm, embedding numerous URLs that lead to potentially malicious redirectors. The primary malicious URL identified is https://cctraff.ru/strik?keyword=weight+watchers+free+foods+pdf, which is linked to known malicious infrastructure. The document's structure and the high number of outbound links suggest an attempt to distribute traffic to various sites, likely for phishing or malware distribution.

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://cctraff.ru/strik?keyword=weight+watchers+free+foods+pdf In PDF document text
- https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/3718456.pdfIn PDF document text
- https://nulixedupalaz.weebly.com/uploads/1/3/0/7/130739510/644f48.pdfIn PDF document text
- https://naxesitigas.weebly.com/uploads/1/3/0/7/130740165/gexujikotavo-wuzov-kafetaxexid.pdfIn PDF document text
- https://nanorobudilason.weebly.com/uploads/1/3/0/7/130775181/xovilefuladoku.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366987/normal_5f89efb7d574b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365660/normal_5f875bbd2222c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368985/normal_5f8b02c452480.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366057/normal_5f8721ac9833d.pdfIn PDF document text
- https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/vigulusudeloku.pdfIn PDF document text
- https://varipejat.weebly.com/uploads/1/3/0/7/130739080/3607731.pdfIn PDF document text
- https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/de93f.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://uploads.strikinglycdn.com/files/db194a02-a47c-4e94-9e77-8bfc5e89fac1/86437562606.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3c653f26-4875-4ec6-a22e-c9686a736b01/bidibumorulebujovenuj.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c77f1d72-0339-45cc-9ae1-69516ff3c63c/9996150432.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8a99b1db-1c3c-4055-abfa-520b90bc763c/70379714216.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0498/3478/6971/files/gozobadefududidipav.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0439/4336/2715/files/skyrim_realistic_water_2.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/5488/1175/files/bao_nguoi_viet_tay_bac_o_seattle.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_off000072fe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x72FE	5172 bytes
SHA-256: `e2d2bd9f870562dda8a13dde0a5fde9685d0f7d4131efcc6238d4f332f4aecce`
`font_01_sfnt_off000084c5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x84C5	10108 bytes
SHA-256: `6079dd11cbbe55132be6ca3c276283b6245f4608230f01a38042fe4e8724b81e`
`font_02_sfnt_off0000a730.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA730	4324 bytes
SHA-256: `1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361`

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