PDF malware analysis — malicious · 0c5bcb1380fb6fcd

MALICIOUS

PDF

43.7 KB Created: 2020-08-30 16:29:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 71aaf45fd210c4822cf2112f5a034b8c SHA-1: f892e2584a635f8426ad0e8d86ec38f1a7122fc1 SHA-256: 0c5bcb1380fb6fcde378ebdf2bb50b68a5ce586613ed904eeffd4480521408c4

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a redirector URL, indicating a phishing or scam attempt. The embedded link directs to 'ttraff.ru', a known malicious redirector, which likely leads to a malicious payload or phishing page. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
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.ru/wix?keyword=sopa+de+pollo+para+el+alma+de+los+ni
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/97493d_0dad3ef8dd5847869bebc48645fb22ec.pdf
- https://static.usrfiles.com/ugd/b8c837_51cdce691b974b5bbe43889054a00054.pdf
- https://static.usrfiles.com/ugd/b8c837_66510327cdb34ea39dd840bf1933f4ff.pdf
- https://cdn.shopify.com/s/files/1/0436/2662/7225/files/vojixurejerowubufizat.pdf
- https://cdn.shopify.com/s/files/1/0434/0976/8600/files/renitejovafuruf.pdf
- https://cdn.shopify.com/s/files/1/0434/8251/3561/files/vivubivawadufedidaji.pdf
- https://cdn.shopify.com/s/files/1/0432/6791/5936/files/nimemexeke.pdf
- https://cdn.shopify.com/s/files/1/0430/1979/6633/files/tamil_songs_2015_to_2019.pdf
- https://cdn.shopify.com/s/files/1/0438/9853/6091/files/15993904938.pdf
- https://cdn.shopify.com/s/files/1/0429/3571/3958/files/happy_hour_invite_free_templates.pdf
- https://cdn.shopify.com/s/files/1/0432/3042/9352/files/33046929085.pdf
- https://cdn.shopify.com/s/files/1/0430/5358/0439/files/wazifisubiwewared.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006798.bin` `a9f3a03c29d4ce32faa11a71b5a9bbf1980ae5e16ade682e3a93e6b545fbedb9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6798	5208 bytes
`font_01_sfnt_off0000792b.bin` `dd01b6d1ddffab2ef89af48e70c8c50ec4a58c7f6d9b39247b537fd167aced67`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x792B	11956 bytes

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