PDF malware analysis — malicious · 8f862b4c987c6735

MALICIOUS

PDF

40.2 KB Created: 2020-08-23 00:05:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d248ba7db2cdb7369333e1d29536561b SHA-1: 8fce2d2e629c288bd08e78ef8dc0bc22ca90936a SHA-256: 8f862b4c987c6735bc8f49f649749f68aa9247aab269283510e325336121d53e

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'ttraff.cc'. The document body, though heavily obfuscated, contains text suggesting it is a guide, which is likely a lure to entice users to click the malicious link. The ML classifier strongly indicates maliciousness, supporting the conclusion that this PDF is designed for malicious redirection.

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.cc/pify?keyword=eve+online+basic+skills+guide
- http://tabutu.eastshorecf.com/uploads/1/3/1/1/131164250/bamogoreserowog.pdf
- http://vuweruv.thorntonheathcricket.co.uk/uploads/1/3/0/8/130814017/xomejiroj.pdf
- http://niwavof.belladesgagnes.com/uploads/1/3/1/3/131381464/b4d042fade.pdf
- http://files.ukogc.com/uploads/1/3/1/3/131380345/fifeb.pdf
- http://files.ferdinandeibl.com/uploads/1/3/0/8/130873921/nixuwexesive-zakonur-jidikamagogub.pdf
- https://cdn.shopify.com/s/files/1/0428/3770/4867/files/51198548577.pdf
- https://cdn.shopify.com/s/files/1/0433/5557/0341/files/91044920689.pdf
- https://cdn.shopify.com/s/files/1/0439/7203/4718/files/lamosazepanuwej.pdf
- https://cdn.shopify.com/s/files/1/0430/5109/0077/files/xidujetimadi.pdf
- https://cdn.shopify.com/s/files/1/0429/3813/8783/files/marolovalub.pdf
- https://cdn.shopify.com/s/files/1/0431/4087/4408/files/89106640345.pdf
- https://cdn.shopify.com/s/files/1/0429/8909/3018/files/kiwojapa.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005f8e.bin` `b597fcb8e878161c4d57981252de924cb3ee3bfa05b1569c37674f678db82ee1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F8E	5232 bytes
`font_01_sfnt_off00007171.bin` `9ae168e94f6cdcb35f2b6ef6f8513a5ace9d2ba11f5f425565ac3498b70cd855`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7171	10208 bytes

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